/* ═══════════════════════════════════════════════════════
   ScholarAI v3 — main.css (Light Theme)
   Fonts: Nunito UI + Space Grotesk body
   Colors: Indigo / Teal / Amber
═══════════════════════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800;900&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
  --ind-900:#1e1b4b;--ind-800:#312e81;--ind-700:#3730a3;
  --ind-600:#4338ca;--ind-500:#4f46e5;--ind-400:#818cf8;
  --ind-200:#c7d2fe;--ind-100:#e0e7ff;--ind-50:#eef2ff;
  --teal-500:#0d9488;--teal-400:#14b8a6;--teal-100:#ccfbf1;
  --amber-500:#f59e0b;--amber-400:#fbbf24;--amber-100:#fef3c7;
  --rose-500:#f43f5e;--rose-400:#fb7185;--rose-100:#ffe4e6;
  --green-500:#16a34a;--green-400:#22c55e;--green-100:#dcfce7;
  --sky-500:#0ea5e9;--sky-100:#e0f2fe;
  --gray-900:#111827;--gray-800:#1f2937;--gray-700:#374151;
  --gray-600:#4b5563;--gray-500:#6b7280;--gray-400:#9ca3af;
  --gray-300:#d1d5db;--gray-200:#e5e7eb;--gray-100:#f3f4f6;
  --gray-50:#f9fafb;--white:#fff;
  --shadow-sm:0 1px 2px rgba(0,0,0,.06);
  --shadow:0 4px 6px -1px rgba(0,0,0,.1),0 2px 4px -2px rgba(0,0,0,.06);
  --shadow-lg:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -4px rgba(0,0,0,.06);
  --shadow-xl:0 20px 25px -5px rgba(0,0,0,.1),0 8px 10px -6px rgba(0,0,0,.06);
  --r-sm:6px;--r:12px;--r-lg:16px;--r-xl:24px;
  --fn:  'Nunito','Space Grotesk',sans-serif;
  --fb:  'Space Grotesk','Nunito',sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html{font-size:16px;scroll-behavior:smooth;height:100%}
body{font-family:var(--fb);background:var(--gray-50);color:var(--gray-900);line-height:1.65;min-height:100%;overflow-x:hidden;padding-top:56px;padding-bottom:70px}
h1,h2,h3,h4{font-family:var(--fn);line-height:1.25}
a{color:var(--ind-600);text-decoration:none}
img{max-width:100%}
::-webkit-scrollbar{width:5px;height:5px}
::-webkit-scrollbar-track{background:var(--gray-100)}
::-webkit-scrollbar-thumb{background:var(--gray-300);border-radius:10px}

/* ── TOP NAV ── */
.top-nav{position:fixed;top:0;left:0;right:0;z-index:300;height:56px;background:rgba(255,255,255,.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--gray-200);box-shadow:var(--shadow-sm)}
.top-nav-inner{max-width:960px;margin:0 auto;height:100%;padding:0 1rem;display:flex;align-items:center;justify-content:space-between}
.top-nav-logo{display:flex;align-items:center;gap:.5rem;font-family:var(--fn);font-weight:900;font-size:1.2rem;color:var(--gray-900);text-decoration:none}
.logo-icon{width:34px;height:34px;background:linear-gradient(135deg,var(--ind-500),var(--teal-400));border-radius:10px;display:flex;align-items:center;justify-content:center;color:white;font-size:1rem}
.logo-accent{background:linear-gradient(90deg,var(--ind-500),var(--teal-500));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.top-nav-right{display:flex;align-items:center;gap:.75rem}
.nav-xp-pill{display:flex;align-items:center;gap:.3rem;background:var(--amber-100);color:var(--amber-500);border:1px solid var(--amber-400);border-radius:20px;padding:.3rem .8rem;font-family:var(--fn);font-weight:800;font-size:.8rem}
.nav-avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--ind-500),var(--teal-400));color:white;font-weight:900;font-size:.85rem;display:flex;align-items:center;justify-content:center;border:2px solid var(--ind-200);cursor:pointer}
.btn-nav-login{padding:.4rem 1rem;background:var(--ind-500);color:white;border-radius:var(--r-sm);font-family:var(--fn);font-weight:700;font-size:.82rem}

/* ── BOTTOM NAV ── */
.bottom-nav{position:fixed;bottom:0;left:0;right:0;z-index:300;background:rgba(255,255,255,.97);backdrop-filter:blur(16px);border-top:1px solid var(--gray-200);display:flex;height:64px;padding-bottom:env(safe-area-inset-bottom);box-shadow:0 -2px 10px rgba(0,0,0,.05)}
.nav-item{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;cursor:pointer;text-decoration:none;color:var(--gray-400);font-family:var(--fn);font-size:.6rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px;transition:color .2s;padding:.4rem 0}
.nav-item.active{color:var(--ind-600)}
.nav-icon{font-size:1.2rem;line-height:1;transition:transform .2s}
.nav-item.active .nav-icon{transform:scale(1.1)}
.nav-label{line-height:1}

/* ── LAYOUT ── */
.page{max-width:720px;margin:0 auto;padding:1.25rem 1rem 1.5rem}
.page-wide{max-width:960px;margin:0 auto;padding:1.25rem 1rem 1.5rem}

/* ── CARDS ── */
.card{background:white;border:1.5px solid var(--gray-200);border-radius:var(--r-lg);padding:1.25rem;box-shadow:var(--shadow-sm);margin-bottom:1rem}
.card:hover{box-shadow:var(--shadow)}
.card-accent{background:linear-gradient(135deg,var(--ind-50),#f0f4ff);border-color:var(--ind-200)}
.card-teal{background:var(--teal-100);border-color:var(--teal-400)}
.card-amber{background:var(--amber-100);border-color:var(--amber-400)}
.card-rose{background:var(--rose-100);border-color:var(--rose-400)}

/* ── BUTTONS ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;padding:.75rem 1.5rem;border:none;border-radius:var(--r-sm);font-family:var(--fn);font-size:.9rem;font-weight:700;cursor:pointer;transition:all .18s;text-decoration:none;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--ind-600),var(--ind-500));color:white;box-shadow:0 4px 14px rgba(79,70,229,.3);width:100%}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(79,70,229,.4)}
.btn-primary:disabled{opacity:.65;cursor:not-allowed;transform:none}
.btn-secondary{background:white;color:var(--ind-600);border:1.5px solid var(--ind-300);width:100%}
.btn-secondary:hover{background:var(--ind-50)}
.btn-teal{background:var(--teal-500);color:white}
.btn-teal:hover{filter:brightness(1.05)}
.btn-amber{background:var(--amber-400);color:white}
.btn-rose{background:var(--rose-500);color:white}
.btn-ghost{background:var(--gray-100);color:var(--gray-700)}
.btn-ghost:hover{background:var(--gray-200)}
.btn-sm{padding:.45rem .9rem;font-size:.8rem}
.btn-xs{padding:.3rem .7rem;font-size:.73rem}
.btn-icon{width:36px;height:36px;padding:0;border-radius:var(--r-sm)}
.btn-danger{background:var(--rose-100);color:var(--rose-500);border:1px solid var(--rose-300)}

/* ── FORMS ── */
.form-group{margin-bottom:1rem}
.form-label{display:block;margin-bottom:.35rem;font-family:var(--fn);font-weight:700;font-size:.72rem;text-transform:uppercase;letter-spacing:.07em;color:var(--gray-600)}
.form-input,.form-select,.form-textarea{width:100%;padding:.75rem 1rem;border:1.5px solid var(--gray-200);border-radius:var(--r-sm);font-family:var(--fb);font-size:.95rem;color:var(--gray-900);background:var(--gray-50);transition:all .18s;appearance:none}
.form-input:focus,.form-select:focus,.form-textarea:focus{outline:none;border-color:var(--ind-500);background:white;box-shadow:0 0 0 3px rgba(79,70,229,.12)}
.form-select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b7280' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:40px;cursor:pointer}
.form-textarea{resize:vertical;min-height:90px}
.form-error{color:var(--rose-500);font-size:.78rem;margin-top:.3rem;font-weight:600}
.form-hint{color:var(--gray-400);font-size:.75rem;margin-top:.3rem}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:.75rem}

/* ── AUTH PAGE ── */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:1.5rem;background:linear-gradient(145deg,var(--ind-900) 0%,var(--ind-800) 60%,#1e3a5f 100%)}
.auth-box{background:white;border-radius:var(--r-xl);padding:2rem;width:100%;max-width:420px;box-shadow:var(--shadow-xl)}
.auth-logo{display:flex;align-items:center;gap:.65rem;margin-bottom:1.5rem;justify-content:center}
.auth-logo-icon{width:48px;height:48px;background:linear-gradient(135deg,var(--ind-500),var(--teal-400));border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;color:white}
.auth-logo-text{font-family:var(--fn);font-weight:900;font-size:1.4rem;color:var(--gray-900)}
.tab-bar{display:flex;background:var(--gray-100);border-radius:var(--r-sm);padding:3px;margin-bottom:1.5rem;gap:3px}
.tab-btn{flex:1;padding:.55rem;border:none;background:none;border-radius:4px;font-family:var(--fn);font-size:.85rem;font-weight:700;color:var(--gray-500);cursor:pointer;transition:all .18s}
.tab-btn.active{background:white;color:var(--gray-900);box-shadow:var(--shadow-sm)}

/* ── HERO / DASHBOARD ── */
.dash-hero{background:linear-gradient(135deg,var(--ind-900) 0%,var(--ind-800) 65%,#1e3a5f 100%);border-radius:var(--r-xl);padding:1.75rem 1.5rem 3rem;position:relative;overflow:hidden;margin-bottom:1.5rem}
.dash-hero::after{content:'';position:absolute;bottom:-1px;left:0;right:0;height:28px;background:var(--gray-50);border-radius:28px 28px 0 0}
.hero-greeting{font-family:var(--fn);font-size:1.5rem;font-weight:900;color:white;margin-bottom:.25rem}
.hero-sub{color:rgba(255,255,255,.6);font-size:.85rem}
.xp-wrap{background:rgba(0,0,0,.25);border-radius:var(--r-lg);padding:.8rem 1.1rem;display:flex;align-items:center;gap:.85rem;margin-top:1rem}
.xp-track{flex:1;height:8px;background:rgba(0,0,0,.4);border-radius:8px;overflow:hidden}
.xp-bar{height:100%;background:linear-gradient(90deg,var(--teal-400),#a3e635);border-radius:8px;transition:width 1s ease}
.xp-pts{font-family:var(--fn);font-weight:800;font-size:.9rem;color:#a3e635;white-space:nowrap}
.streak-badge{display:flex;align-items:center;gap:.35rem;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.15);border-radius:20px;padding:.3rem .85rem;font-family:var(--fn);font-weight:800;font-size:.85rem;color:var(--amber-400)}

/* ── SUBJECT / TOPIC CARDS ── */
.subject-card{background:white;border:1.5px solid var(--gray-200);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-sm);transition:all .22s;position:relative}
.subject-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.subject-accent{height:4px;width:100%}
.subject-body{padding:1.1rem}
.subject-icon{width:44px;height:44px;border-radius:var(--r-sm);display:flex;align-items:center;justify-content:center;font-size:1.3rem;flex-shrink:0}
.subject-name{font-family:var(--fn);font-weight:800;font-size:.95rem;color:var(--gray-900);margin-bottom:.3rem}
.subject-meta{font-size:.77rem;color:var(--gray-500)}
.progress-track{width:100%;height:6px;background:var(--gray-100);border-radius:6px;overflow:hidden;margin:.6rem 0}
.progress-fill{height:100%;border-radius:6px;transition:width .8s ease}

/* ── CHIPS / BADGES ── */
.chip{display:inline-flex;align-items:center;gap:3px;padding:.2rem .65rem;border-radius:12px;font-size:.65rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px;font-family:var(--fn)}
.chip-blue{background:var(--ind-50);color:var(--ind-700);border:1px solid var(--ind-200)}
.chip-teal{background:var(--teal-100);color:var(--teal-500);border:1px solid var(--teal-400)}
.chip-amber{background:var(--amber-100);color:#92400e;border:1px solid var(--amber-400)}
.chip-rose{background:var(--rose-100);color:#9f1239;border:1px solid var(--rose-400)}
.chip-green{background:var(--green-100);color:var(--green-500);border:1px solid var(--green-400)}
.chip-gray{background:var(--gray-100);color:var(--gray-600);border:1px solid var(--gray-200)}

/* ── NOTES / LESSON ── */
.lesson-step{background:white;border:2px solid var(--gray-200);border-radius:var(--r-xl);padding:1.25rem;margin-bottom:1.4rem;position:relative;overflow:hidden;box-shadow:0 4px 0 var(--gray-200)}
.step-accent{position:absolute;top:0;left:0;right:0;height:5px}
.step-header{display:flex;align-items:center;gap:.8rem;margin-bottom:.85rem;padding-bottom:.85rem;border-bottom:1px solid var(--gray-100)}
.step-num{width:32px;height:32px;border-radius:var(--r-sm);display:flex;align-items:center;justify-content:center;font-family:var(--fn);font-size:.9rem;font-weight:800;flex-shrink:0}
.step-title{font-family:var(--fn);font-size:1.05rem;font-weight:800;line-height:1.2;flex:1;color:var(--gray-900)}
.lesson-body{color:var(--gray-700);font-size:.92rem;line-height:1.8}
.lesson-body p{margin-bottom:.75rem}
.lesson-body h1,.lesson-body h2,.lesson-body h3{font-family:var(--fn);color:var(--gray-900);margin:1.25rem 0 .5rem;font-weight:800}
.lesson-body h1{font-size:1.2rem}.lesson-body h2{font-size:1.05rem}.lesson-body h3{font-size:.95rem}
.lesson-body ul,.lesson-body ol{margin-left:1.25rem;margin-bottom:.75rem}
.lesson-body li{margin-bottom:.3rem}
.lesson-body strong{font-weight:700;color:var(--gray-900)}
.lesson-body code{background:var(--gray-100);padding:2px 5px;border-radius:4px;font-size:.86em;font-family:monospace}
.lesson-body pre{background:var(--gray-900);color:#e2e8f0;padding:.9rem;border-radius:var(--r-sm);overflow-x:auto;margin:.75rem 0;font-size:.83rem;line-height:1.6}
.lesson-body blockquote{border-left:4px solid var(--ind-400);padding:.5rem .85rem;background:var(--ind-50);border-radius:0 var(--r-sm) var(--r-sm) 0;margin:.75rem 0;font-style:italic;color:var(--gray-700)}
.table-scroll{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;margin:.85rem 0;border:1.5px solid var(--gray-200);border-radius:var(--r);box-shadow:0 2px 0 var(--gray-200)}
.lesson-body table{width:100%;border-collapse:collapse;min-width:max-content;font-size:.87rem}
.lesson-body th{background:var(--gray-50);color:var(--gray-700);padding:9px 13px;text-align:left;font-weight:800;border-bottom:2px solid var(--gray-200);font-family:var(--fn);font-size:.77rem;white-space:nowrap}
.lesson-body td{padding:9px 13px;border-bottom:1px solid var(--gray-100);vertical-align:top}
.lesson-body tr:last-child td{border-bottom:none}
.lesson-body tr:hover td{background:var(--gray-50)}
.mermaid-wrap{background:white;border:1.5px solid var(--gray-200);border-radius:var(--r);padding:1.1rem;margin:.85rem 0;overflow-x:auto;text-align:center;box-shadow:0 2px 0 var(--gray-200)}
.mermaid-err{padding:.75rem;background:var(--rose-100);color:#9f1239;border-radius:var(--r-sm);font-size:.8rem;border:1px solid var(--rose-300)}

/* ── MCQ QUIZ ── */
.mcq-card{background:white;border:1.5px solid var(--gray-200);border-radius:var(--r-lg);padding:1.1rem;margin-bottom:.85rem;box-shadow:var(--shadow-sm)}
.mcq-qnum{font-size:.66rem;font-weight:800;color:var(--gray-400);text-transform:uppercase;letter-spacing:1px;margin-bottom:.5rem;font-family:var(--fn)}
.mcq-q{font-size:.9rem;font-weight:600;color:var(--gray-900);margin-bottom:.9rem;line-height:1.5}
.mcq-opts{display:flex;flex-direction:column;gap:.4rem}
.mcq-opt{padding:.65rem .85rem;border-radius:var(--r-sm);border:1.5px solid var(--gray-200);background:white;cursor:pointer;font-size:.86rem;transition:all .15s;display:flex;align-items:center;gap:.6rem;color:var(--gray-700);font-family:var(--fb)}
.mcq-opt:hover:not(.correct):not(.wrong){border-color:var(--gray-400);background:var(--gray-50)}
.mcq-opt.correct{border-color:var(--teal-400);background:var(--teal-100);color:var(--teal-500)}
.mcq-opt.wrong{border-color:var(--rose-400);background:var(--rose-100);color:var(--rose-500)}
.opt-key{width:24px;height:24px;min-width:24px;border-radius:4px;background:var(--gray-100);display:flex;align-items:center;justify-content:center;font-family:var(--fn);font-weight:800;font-size:.72rem;color:var(--gray-600)}
.mcq-opt.correct .opt-key{background:var(--teal-400);color:white}
.mcq-opt.wrong .opt-key{background:var(--rose-500);color:white}
.mcq-explanation{margin-top:.75rem;padding:.75rem;background:var(--gray-50);border:1px solid var(--gray-200);border-radius:var(--r-sm);font-size:.8rem;color:var(--gray-700);display:none;line-height:1.5}
.mcq-explanation.show{display:block}
.score-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:.6rem;margin-bottom:1rem}
.score-box{text-align:center;background:white;border:1px solid var(--gray-200);border-radius:var(--r-sm);padding:.75rem .5rem;box-shadow:var(--shadow-sm)}
.score-box .sv{font-family:var(--fn);font-size:1.3rem;font-weight:900;display:block;line-height:1;margin-bottom:.2rem}
.score-box .sl{font-size:.62rem;text-transform:uppercase;letter-spacing:.5px;font-weight:700;color:var(--gray-500)}
.score-correct .sv{color:var(--teal-400)}.score-wrong .sv{color:var(--rose-500)}.score-total .sv{color:var(--gray-900)}
.hearts-row{display:flex;gap:.2rem;align-items:center}
.heart{font-size:1rem;transition:all .3s;color:var(--rose-500)}
.heart.lost{filter:grayscale(1) opacity(.3);transform:scale(.8)}

/* ── CHAT TUTOR ── */
.chat-outer{display:flex;flex-direction:column;height:calc(100vh - 130px)}
.wa-hdr{background:#075e54;color:white;padding:.8rem 1rem;display:flex;align-items:center;gap:.85rem;flex-shrink:0;border-radius:var(--r-lg) var(--r-lg) 0 0}
.wa-avatar-ai{width:40px;height:40px;border-radius:50%;background:white;display:flex;align-items:center;justify-content:center;font-size:1.4rem;color:#075e54;flex-shrink:0}
.wa-info .wa-name{font-family:var(--fn);font-weight:700;font-size:.95rem}
.wa-info .wa-status{font-size:.72rem;color:#dcf8c6}
.chat-area{flex:1;overflow-y:auto;padding:1rem;display:flex;flex-direction:column;gap:.4rem;background:#e5ddd5;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60' opacity='0.07'%3E%3Ccircle cx='30' cy='30' r='2' fill='%23999'/%3E%3C/svg%3E");background-size:60px;-webkit-overflow-scrolling:touch}
.wa-bubble{max-width:85%;padding:8px 12px;border-radius:8px;font-size:.9rem;line-height:1.5;position:relative;box-shadow:0 1px 1px rgba(0,0,0,.1);word-wrap:break-word}
.wa-bubble.ai{align-self:flex-start;background:white;color:#303030;border-top-left-radius:0}
.wa-bubble.ai::before{content:'';position:absolute;top:0;left:-8px;width:0;height:0;border-top:10px solid white;border-left:10px solid transparent}
.wa-bubble.user{align-self:flex-end;background:#dcf8c6;color:#303030;border-top-right-radius:0}
.wa-bubble.user::before{content:'';position:absolute;top:0;right:-8px;width:0;height:0;border-top:10px solid #dcf8c6;border-right:10px solid transparent}
.wa-bubble p{margin-bottom:.35rem}.wa-bubble p:last-child{margin-bottom:0}
.wa-bubble ul{margin-left:1.1rem;margin-bottom:.35rem}
.wa-bubble code{background:rgba(0,0,0,.07);padding:1px 4px;border-radius:3px;font-size:.85em;font-family:monospace}
.wa-time{font-size:.6rem;color:rgba(0,0,0,.4);float:right;margin-top:4px;margin-left:10px}
.typing-dots{display:flex;gap:4px;align-items:center;padding:4px 2px}
.typing-dots span{width:7px;height:7px;background:#aaa;border-radius:50%;animation:bounce .9s ease infinite}
.typing-dots span:nth-child(2){animation-delay:.15s}
.typing-dots span:nth-child(3){animation-delay:.3s}
@keyframes bounce{0%,100%{transform:translateY(0)}50%{transform:translateY(-4px)}}
.chat-input-row{background:#f0f0f0;padding:8px;display:flex;gap:7px;align-items:center;flex-shrink:0;border-radius:0 0 var(--r-lg) var(--r-lg);padding-bottom:max(8px,env(safe-area-inset-bottom))}
.chat-txt{flex:1;border-radius:22px;border:none;padding:10px 14px;font-size:.9rem;font-family:var(--fb);outline:none;box-shadow:0 1px 2px rgba(0,0,0,.06)}
.chat-send{width:42px;height:42px;min-width:42px;border-radius:50%;background:#128C7E;color:white;display:flex;align-items:center;justify-content:center;border:none;cursor:pointer;font-size:1.1rem}

/* ── RANK PAGE ── */
.rank-hero{background:linear-gradient(135deg,var(--ind-900),var(--ind-800));border-radius:var(--r-xl);padding:1.5rem;text-align:center;color:white;margin-bottom:1.25rem}
.rank-hero h2{font-size:1.4rem;margin-bottom:.25rem}
.rank-table{width:100%;border-collapse:collapse;background:white;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow)}
.rank-table th{background:var(--ind-50);color:var(--ind-700);padding:.75rem 1rem;text-align:left;font-family:var(--fn);font-size:.75rem;text-transform:uppercase;letter-spacing:.06em;font-weight:800;border-bottom:2px solid var(--ind-200)}
.rank-table td{padding:.85rem 1rem;border-bottom:1px solid var(--gray-100);vertical-align:middle}
.rank-table tr:last-child td{border-bottom:none}
.rank-table tr.me td{background:var(--ind-50)}
.rank-table tr:hover td{background:var(--gray-50)}
.rank-pos{font-family:var(--fn);font-weight:900;font-size:1.1rem;width:40px}
.rank-user{display:flex;align-items:center;gap:.6rem}
.rank-avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--ind-500),var(--teal-400));color:white;font-weight:800;font-size:.85rem;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.rank-name{font-weight:700;font-size:.9rem}
.rank-prog{font-size:.72rem;color:var(--gray-500)}
.rank-xp{font-family:var(--fn);font-weight:800;color:var(--ind-600)}
.rank-lv{font-size:.72rem;font-weight:700;background:var(--ind-50);color:var(--ind-600);border-radius:8px;padding:2px 6px;font-family:var(--fn)}
.medal-1{color:#f59e0b}.medal-2{color:#9ca3af}.medal-3{color:#b45309}

/* ── PROFILE ── */
.profile-card{background:white;border-radius:var(--r-xl);padding:1.75rem;text-align:center;margin-bottom:1rem;box-shadow:var(--shadow);border:1.5px solid var(--gray-200)}
.profile-avatar-lg{width:76px;height:76px;border-radius:50%;background:linear-gradient(135deg,var(--ind-500),var(--teal-400));margin:0 auto .75rem;display:flex;align-items:center;justify-content:center;font-size:2rem;font-weight:900;color:white;border:3px solid var(--ind-100);box-shadow:var(--shadow)}
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:.65rem;margin:1rem 0}
.stat-box{background:var(--gray-50);border:1px solid var(--gray-200);border-radius:var(--r-sm);padding:.9rem .5rem;text-align:center}
.stat-box .sv{font-family:var(--fn);font-size:1.1rem;font-weight:900;display:block;margin-bottom:.2rem}
.stat-box .sl{font-size:.62rem;text-transform:uppercase;letter-spacing:.5px;font-weight:700;color:var(--gray-500)}
.settings-row{display:flex;justify-content:space-between;align-items:center;padding:.85rem 0;border-bottom:1px solid var(--gray-100)}
.settings-row:last-child{border:none}
.sl-label{font-weight:700;font-size:.88rem}
.sl-sub{font-size:.75rem;color:var(--gray-500)}

/* ── ADD COURSE ── */
.topic-builder{background:var(--gray-50);border:1.5px solid var(--gray-200);border-radius:var(--r-sm);padding:.9rem;margin-bottom:.65rem}
.topic-num{width:24px;height:24px;border-radius:50%;background:linear-gradient(135deg,var(--ind-500),var(--teal-400));color:white;font-weight:800;font-size:.75rem;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.st-tags{display:flex;flex-wrap:wrap;gap:5px;margin:5px 0}
.st-tag{display:inline-flex;align-items:center;gap:4px;padding:3px 9px;border-radius:12px;font-size:.73rem;font-weight:600;background:var(--ind-50);border:1px solid var(--ind-200);color:var(--ind-700)}
.st-tag button{background:none;border:none;color:var(--ind-500);cursor:pointer;font-size:.82rem;line-height:1;padding:0;opacity:.7}
.add-topic-btn{width:100%;padding:.65rem;border-radius:var(--r-sm);border:2px dashed var(--gray-300);background:none;color:var(--ind-600);cursor:pointer;font-family:var(--fn);font-weight:700;font-size:.82rem;display:flex;align-items:center;justify-content:center;gap:.4rem;transition:all .18s;margin-bottom:.85rem}
.add-topic-btn:hover{background:var(--ind-50);border-color:var(--ind-300)}
.pdf-drop{border:2px dashed var(--gray-300);border-radius:var(--r-lg);padding:2rem 1.5rem;text-align:center;cursor:pointer;transition:all .2s;background:white;margin-bottom:.85rem}
.pdf-drop.over,.pdf-drop:hover{background:var(--ind-50);border-color:var(--ind-400)}
.pdf-drop-icon{font-size:2.2rem;color:var(--gray-400);margin-bottom:.6rem}

/* ── PROGRESS STRIP ── */
.ps-wrap{background:white;border:1.5px solid var(--gray-200);border-radius:var(--r-lg);padding:1.25rem;text-align:center;margin-bottom:1.25rem;box-shadow:var(--shadow-sm)}
.ps-track{height:8px;background:var(--gray-100);border-radius:8px;overflow:hidden;margin:.75rem 0}
.ps-bar{height:100%;background:var(--ind-500);border-radius:8px;width:0;transition:width .8s ease}
.ps-text{font-family:var(--fn);font-size:.8rem;font-weight:700;color:var(--gray-500)}

/* ── FLASH / TOAST ── */
.flash-msgs{position:fixed;top:65px;left:50%;transform:translateX(-50%);z-index:400;display:flex;flex-direction:column;gap:.4rem;width:90%;max-width:420px}
.flash{padding:.7rem 1rem;border-radius:var(--r-sm);font-weight:600;font-size:.86rem;display:flex;justify-content:space-between;align-items:center;box-shadow:var(--shadow)}
.flash-info{background:var(--ind-50);border:1px solid var(--ind-200);color:var(--ind-700)}
.flash-success{background:var(--green-100);border:1px solid var(--green-400);color:var(--green-500)}
.flash-error{background:var(--rose-100);border:1px solid var(--rose-400);color:var(--rose-500)}
.flash button{background:none;border:none;cursor:pointer;font-size:1rem;color:inherit;opacity:.7}
#toast-box{position:fixed;top:68px;right:12px;z-index:500;display:flex;flex-direction:column;gap:.4rem}
.toast{padding:.6rem 1.1rem;border-radius:var(--r-sm);font-family:var(--fn);font-weight:700;font-size:.82rem;animation:toastIn .25s ease;max-width:280px;box-shadow:var(--shadow)}
@keyframes toastIn{from{transform:translateX(110%);opacity:0}to{transform:none;opacity:1}}
.toast-success{background:var(--green-100);border:1.5px solid var(--green-400);color:var(--green-500)}
.toast-error{background:var(--rose-100);border:1.5px solid var(--rose-400);color:var(--rose-500)}
.toast-info{background:var(--ind-50);border:1.5px solid var(--ind-200);color:var(--ind-700)}

/* ── SKELETON ── */
.skeleton{background:linear-gradient(90deg,var(--gray-100) 25%,var(--gray-200) 50%,var(--gray-100) 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:4px}
@keyframes shimmer{from{background-position:-200% 0}to{background-position:200% 0}}
.sk-line{height:12px;margin-bottom:8px}.sk-line.sh{width:55%}.sk-line.sm{width:78%}.sk-line.sf{width:100%}
.spinner{width:18px;height:18px;border:2.5px solid var(--gray-200);border-top-color:var(--ind-500);border-radius:50%;animation:spin .7s linear infinite;display:inline-block;vertical-align:middle}
@keyframes spin{to{transform:rotate(360deg)}}

/* ── INSTALL BANNER ── */
.install-banner{position:fixed;bottom:74px;left:10px;right:10px;z-index:290;background:white;border:1.5px solid var(--gray-200);border-radius:var(--r-lg);padding:10px 14px;display:flex;align-items:center;gap:10px;box-shadow:var(--shadow-xl);animation:slideUp .3s ease}
@keyframes slideUp{from{transform:translateY(20px);opacity:0}to{transform:none;opacity:1}}
.install-banner.hidden{display:none}

/* ── EMPTY STATE ── */
.empty{text-align:center;padding:3rem 1.5rem}
.empty-icon{font-size:2.5rem;color:var(--gray-300);margin-bottom:.65rem}
.empty-title{font-family:var(--fn);font-weight:800;font-size:1rem;color:var(--gray-600);margin-bottom:.3rem}
.empty-sub{font-size:.82rem;color:var(--gray-400);margin-bottom:1.25rem}

/* ── DIVIDER ── */
.divider{display:flex;align-items:center;gap:8px;margin:1rem 0}
.divider::before,.divider::after{content:'';flex:1;height:1px;background:var(--gray-200)}
.divider span{font-size:.7rem;color:var(--gray-400);font-weight:700;text-transform:uppercase;letter-spacing:.06em;white-space:nowrap}

/* ── MODAL ── */
.modal-overlay{position:fixed;inset:0;background:rgba(17,24,39,.7);backdrop-filter:blur(4px);display:none;align-items:flex-end;justify-content:center;z-index:600;padding:0}
.modal-overlay.open{display:flex}
.modal-sheet{background:white;width:100%;max-width:700px;max-height:90vh;border-radius:var(--r-xl) var(--r-xl) 0 0;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 -10px 40px rgba(0,0,0,.2)}
.modal-handle{width:40px;height:4px;background:var(--gray-300);border-radius:2px;margin:.65rem auto 0;flex-shrink:0}
.modal-hdr{padding:.85rem 1.25rem;border-bottom:1px solid var(--gray-200);display:flex;justify-content:space-between;align-items:center;flex-shrink:0}
.modal-hdr h2{font-size:.97rem;font-weight:800}
.modal-close{width:30px;height:30px;background:white;border:1px solid var(--gray-200);border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:.9rem}
.modal-body{padding:1.25rem;overflow-y:auto;flex:1;-webkit-overflow-scrolling:touch}

/* ── MISC ── */
.hidden{display:none!important}
.text-center{text-align:center}.text-muted{color:var(--gray-500)}
.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}
.mb-1{margin-bottom:.5rem}.mb-2{margin-bottom:1rem}
.flex-row{display:flex;align-items:center}.flex-between{display:flex;align-items:center;justify-content:space-between}
.gap-sm{gap:.5rem}.gap-md{gap:.75rem}
.w-full{width:100%}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:.75rem}
.grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:.6rem}

@media(min-width:640px){.page,.page-wide{padding:1.5rem 1.25rem 2rem}}

/* Premium mobile UI upgrade */
:root{--premium-a:#4f46e5;--premium-b:#7c3aed;--premium-c:#0d9488;--ink:#0f172a}
body{background:radial-gradient(circle at top left,#eef2ff 0,#f8fafc 38%,#f0fdfa 100%)}
.top-nav{backdrop-filter:blur(18px);background:rgba(255,255,255,.82);border-bottom:1px solid rgba(148,163,184,.25)}
.logo-icon,.auth-logo-icon{background:linear-gradient(135deg,var(--premium-a),var(--premium-b));box-shadow:0 12px 30px rgba(79,70,229,.25)}
.top-nav-logo span,.auth-logo-text{letter-spacing:-.04em}.logo-accent{color:var(--premium-b)}
.premium-mark{width:38px;height:38px;border-radius:16px;background:linear-gradient(135deg,var(--premium-a),var(--premium-b));display:inline-grid;place-items:center;box-shadow:0 14px 34px rgba(79,70,229,.28)}
.premium-mark img{width:24px;height:24px}.premium-pill{display:inline-flex;align-items:center;gap:.4rem;padding:.32rem .68rem;border-radius:999px;background:linear-gradient(135deg,#fef3c7,#fff7ed);border:1px solid #fde68a;color:#92400e;font-family:var(--fn);font-weight:900;font-size:.72rem}
.mobile-shell{max-width:480px;margin:0 auto;padding:1rem 1rem 6rem}.glass-card{background:rgba(255,255,255,.82);border:1px solid rgba(255,255,255,.75);box-shadow:0 18px 55px rgba(15,23,42,.08);backdrop-filter:blur(18px);border-radius:24px}
.dash-hero,.school-hero{border-radius:28px!important;box-shadow:0 22px 70px rgba(79,70,229,.24);background:linear-gradient(140deg,#111827 0%,#4338ca 45%,#7c3aed 72%,#0d9488 100%)!important}
.subject-card,.card,.auth-box,.topic-builder,.subject-quiz-card,.competition-card{border-radius:22px!important;box-shadow:0 14px 38px rgba(15,23,42,.07);border-color:rgba(148,163,184,.22)!important}
.btn,.form-input,.form-select{border-radius:16px!important}.btn-primary{background:linear-gradient(135deg,var(--premium-a),var(--premium-b))!important;box-shadow:0 12px 28px rgba(79,70,229,.24)}
.bottom-nav{left:50%!important;transform:translateX(-50%);right:auto!important;bottom:12px!important;width:min(94vw,520px)!important;border-radius:28px!important;border:1px solid rgba(255,255,255,.65)!important;background:rgba(255,255,255,.86)!important;backdrop-filter:blur(22px);box-shadow:0 18px 50px rgba(15,23,42,.18);padding:.35rem!important}
.nav-item{border-radius:20px!important}.nav-item.active{background:linear-gradient(135deg,#eef2ff,#f5f3ff);color:var(--premium-b)!important}.nav-item.active .nav-icon{transform:translateY(-1px) scale(1.08)}
.ai-info-box{display:none;margin-top:.55rem;background:linear-gradient(135deg,#eef2ff,#f0fdfa);border:1.5px solid #c7d2fe;border-radius:18px;padding:.85rem;font-size:.78rem;color:#334155;line-height:1.55}.ai-info-box.show{display:block}.ai-info-box strong{color:#3730a3}
.future-card{display:block;text-decoration:none;color:inherit;padding:1rem;border-radius:22px;background:white;border:1px solid #e5e7eb;box-shadow:0 12px 30px rgba(15,23,42,.06);margin-bottom:.75rem}.future-card h3{font-size:.96rem;margin-bottom:.25rem}.future-card p{font-size:.78rem;color:#64748b;line-height:1.55}.future-tag{display:inline-flex;padding:.22rem .55rem;border-radius:999px;background:#eef2ff;color:#4338ca;font-weight:800;font-size:.66rem;margin:.35rem .25rem .1rem 0}.tutor-clean-header{background:linear-gradient(135deg,#111827,#4f46e5);color:white;border-radius:0 0 24px 24px;padding:.85rem 1rem;display:flex;align-items:center;gap:.75rem}.tutor-clean-header img{width:34px;height:34px}.tutor-clean-header .title{font-family:var(--fn);font-weight:900}.tutor-clean-header .sub{font-size:.72rem;color:rgba(255,255,255,.7)}
@media(max-width:620px){.page,.page-wide{padding:1rem 1rem 6.5rem!important}.grid-2{grid-template-columns:1fr!important}.auth-wrap{padding:.75rem!important}.auth-box{width:100%!important}.top-nav-inner{padding:.6rem .9rem}.hero-greeting{font-size:1.3rem!important}.dash-hero{padding:1.25rem!important}.nav-label{font-size:.58rem!important}.nav-icon{font-size:1.15rem!important}}

/* Mobile logo + Prof. Aria chat patch */
.top-nav-logo{min-width:0;overflow:hidden}.top-nav-logo>span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:150px}
.premium-mark{width:38px!important;height:38px!important;min-width:38px!important;max-width:38px!important;min-height:38px!important;max-height:38px!important;overflow:hidden!important;border-radius:14px!important;display:inline-flex!important;align-items:center!important;justify-content:center!important;line-height:0!important;flex:0 0 38px!important;position:relative!important}
.premium-mark img,.top-nav-logo .premium-mark img{width:25px!important;height:25px!important;min-width:25px!important;max-width:25px!important;min-height:25px!important;max-height:25px!important;display:block!important;object-fit:contain!important;position:static!important;transform:none!important}
.nav-xp-pill{max-width:118px;min-width:0}.nav-xp-pill span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.top-nav-right{gap:.45rem!important;min-width:0}.nav-avatar{flex:0 0 34px}
.college-choice-list{display:grid;gap:.55rem;margin-top:.65rem}.college-choice{width:100%;text-align:left;border:1.5px solid #c7d2fe;background:#fff;border-radius:16px;padding:.75rem .85rem;cursor:pointer;box-shadow:0 8px 20px rgba(79,70,229,.08)}.college-choice strong{display:block;color:#1e1b4b;font-size:.86rem}.college-choice small{display:block;color:#64748b;font-size:.72rem;line-height:1.45;margin-top:.2rem}.college-choice.active{border-color:#4f46e5;background:#eef2ff}.college-badge{display:inline-flex;margin:.3rem .25rem 0 0;padding:.16rem .45rem;border-radius:999px;background:#f8fafc;border:1px solid #e2e8f0;color:#475569;font-size:.64rem;font-weight:800}
.aria-chat-page{height:calc(100dvh - 56px - 76px);max-width:720px;margin:0 auto;padding:.65rem .75rem .2rem;overflow:hidden}.aria-phone-chat{height:100%;min-height:0;display:flex;flex-direction:column;border-radius:28px;background:rgba(255,255,255,.86);box-shadow:0 20px 60px rgba(15,23,42,.14);overflow:hidden;border:1px solid rgba(255,255,255,.8);backdrop-filter:blur(18px)}.aria-chat-header{display:flex;align-items:center;gap:.72rem;padding:.75rem .85rem;background:linear-gradient(135deg,#111827,#4338ca 55%,#7c3aed);color:#fff;flex-shrink:0}.aria-avatar{width:42px;height:42px;border-radius:16px;background:rgba(255,255,255,.14);display:grid;place-items:center;border:1px solid rgba(255,255,255,.18);overflow:hidden;flex:0 0 42px}.aria-avatar img{width:30px!important;height:30px!important;object-fit:contain!important;display:block!important}.aria-title-wrap{min-width:0;flex:1}.aria-title{font-family:var(--fn);font-weight:900;font-size:1rem;letter-spacing:-.02em}.aria-status{font-size:.7rem;color:rgba(255,255,255,.72);display:flex;align-items:center;gap:.35rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.aria-status span{width:7px;height:7px;border-radius:50%;background:#22c55e;box-shadow:0 0 0 4px rgba(34,197,94,.18);display:inline-block;flex:0 0 7px}.aria-small-action,.aria-clear{border:0;background:rgba(255,255,255,.14);color:#fff;border-radius:14px;height:34px;padding:0 .75rem;display:inline-flex;align-items:center;justify-content:center;font-family:var(--fn);font-size:.72rem;font-weight:900;cursor:pointer;text-decoration:none}.aria-clear{width:34px;padding:0;flex:0 0 34px}.aria-context-pill{margin:.55rem .75rem 0;padding:.45rem .7rem;border-radius:999px;background:linear-gradient(135deg,#eef2ff,#f5f3ff);color:#4338ca;border:1px solid #ddd6fe;font-size:.72rem;font-weight:800;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex-shrink:0}.aria-chat-area{background:linear-gradient(180deg,#f8fafc 0%,#eef2ff 100%)!important;background-image:none!important;padding:.85rem .75rem!important;gap:.55rem!important}.aria-bubble-ai,.aria-bubble-user{border-radius:20px!important;padding:.72rem .85rem!important;font-size:.9rem!important;line-height:1.6!important;box-shadow:0 10px 24px rgba(15,23,42,.08)!important}.aria-bubble-ai{background:#fff!important;border-top-left-radius:8px!important;border:1px solid #eef2ff;color:#111827!important}.aria-bubble-user{background:linear-gradient(135deg,#4338ca,#7c3aed)!important;color:#fff!important;border-top-right-radius:8px!important}.aria-bubble-ai::before,.aria-bubble-user::before{display:none!important}.aria-bubble-user .wa-time{color:rgba(255,255,255,.68)!important}.aria-suggestions{display:flex;gap:.45rem;overflow-x:auto;padding:.55rem .75rem;background:rgba(248,250,252,.95);border-top:1px solid #e5e7eb;flex-shrink:0;scrollbar-width:none}.aria-suggestions::-webkit-scrollbar{display:none}.aria-suggestions button{border:1px solid #dbe3ff;background:#fff;color:#4338ca;border-radius:999px;padding:.48rem .72rem;font-family:var(--fn);font-size:.72rem;font-weight:800;white-space:nowrap;cursor:pointer;box-shadow:0 6px 16px rgba(79,70,229,.08)}.aria-input-row{background:#fff!important;border-top:1px solid #e5e7eb!important;border-radius:0!important;padding:.6rem .7rem!important;gap:.55rem!important}.aria-input{height:44px!important;border:1px solid #e5e7eb!important;border-radius:18px!important;background:#f8fafc!important;box-shadow:none!important}.aria-send{width:44px!important;height:44px!important;min-width:44px!important;background:linear-gradient(135deg,#4338ca,#7c3aed)!important;box-shadow:0 10px 22px rgba(79,70,229,.28)!important;font-size:1rem!important}
@media(max-width:620px){body{padding-bottom:86px!important}.top-nav{height:56px!important}.top-nav-inner{height:56px!important}.top-nav-logo{gap:.4rem!important;font-size:1.05rem!important}.premium-mark{width:34px!important;height:34px!important;min-width:34px!important;max-width:34px!important;min-height:34px!important;max-height:34px!important;border-radius:13px!important}.premium-mark img,.top-nav-logo .premium-mark img{width:22px!important;height:22px!important;min-width:22px!important;max-width:22px!important;min-height:22px!important;max-height:22px!important}.nav-xp-pill{padding:.24rem .55rem!important;font-size:.72rem!important;max-width:88px}.nav-avatar{width:32px!important;height:32px!important;flex-basis:32px!important}.aria-chat-page{height:calc(100dvh - 56px - 92px);padding:.45rem .45rem 0}.aria-phone-chat{border-radius:0;background:white;box-shadow:none;border-left:0;border-right:0}.aria-context-pill{margin:.45rem .6rem 0}.aria-chat-header{padding:.65rem .7rem}.aria-avatar{width:38px;height:38px;border-radius:14px;flex-basis:38px}.aria-avatar img{width:27px!important;height:27px!important}.aria-title{font-size:.96rem}.aria-small-action{display:none}.aria-chat-area{padding:.72rem .6rem!important}.aria-bubble-ai,.aria-bubble-user{max-width:88%!important;font-size:.86rem!important}.aria-suggestions{padding:.5rem .6rem}.aria-input-row{padding:.52rem .58rem!important;padding-bottom:max(.52rem,env(safe-area-inset-bottom))!important}.form-grid{grid-template-columns:1fr!important}.auth-box{max-width:460px!important;padding:1.2rem!important;border-radius:26px!important}.auth-wrap{align-items:flex-start!important;overflow-y:auto!important}.college-choice strong{font-size:.82rem}.college-choice small{font-size:.69rem}}
/* PhD / Thesis mobile UI */
.phd-reg-panel{background:linear-gradient(135deg,#f8fafc,#eef2ff);border:1.5px solid #c7d2fe;border-radius:18px;padding:1rem;margin:1rem 0;box-shadow:0 12px 28px rgba(79,70,229,.10)}
.phd-reg-head{display:flex;gap:.75rem;align-items:center;margin-bottom:.75rem}.phd-reg-head strong{display:block;font-family:var(--fn);font-weight:900;color:#312e81}.phd-reg-head small{display:block;color:#64748b;font-size:.75rem;line-height:1.4}.phd-reg-icon{width:44px;height:44px;border-radius:16px;background:white;display:grid;place-items:center;box-shadow:var(--shadow-sm)}
.phd-chip-list{display:flex;flex-wrap:wrap;gap:.35rem;margin:.6rem 0}.phd-chip{font-size:.7rem;font-weight:800;color:#3730a3;background:#eef2ff;border:1px solid #c7d2fe;border-radius:999px;padding:.25rem .55rem}
.phd-page{padding-bottom:7rem}.phd-hero{display:flex;gap:1rem;align-items:center;background:linear-gradient(135deg,#1e1b4b,#312e81);color:white;border:0;overflow:hidden}.phd-hero h1{color:white;font-size:1.35rem;margin:.1rem 0}.phd-hero p{color:rgba(255,255,255,.75);font-size:.85rem;margin:0;line-height:1.55}.phd-hero-icon{width:58px;height:58px;border-radius:22px;background:rgba(255,255,255,.14);display:grid;place-items:center;font-size:1.8rem;flex:0 0 auto}.eyebrow{font-size:.68rem;text-transform:uppercase;letter-spacing:.12em;color:#c4b5fd;font-weight:900}
.phd-panel-card .panel-title{font-family:var(--fn);font-size:1rem;font-weight:900;color:#111827;margin-bottom:.75rem}.tiny-note{font-size:.78rem;color:#64748b;line-height:1.5;margin-top:-.25rem}.thesis-chapter{display:flex;gap:.8rem;align-items:flex-start;background:white;border:1.5px solid #e5e7eb;border-radius:18px;padding:.9rem;margin-bottom:.65rem;box-shadow:var(--shadow-sm)}.chapter-no{width:34px;height:34px;border-radius:12px;background:#eef2ff;color:#3730a3;font-family:var(--fn);font-weight:900;display:grid;place-items:center;flex:0 0 auto}.thesis-chapter strong{display:block;font-size:.88rem;color:#111827}.thesis-chapter small{display:block;color:#64748b;font-size:.76rem;margin-top:.2rem}.thesis-chapter p{font-size:.75rem;color:#64748b;margin:.45rem 0 0;line-height:1.45}.timeline-row{display:flex;gap:.7rem;border-top:1px solid #eef2ff;padding:.6rem 0;font-size:.82rem}.timeline-row b{min-width:78px;color:#3730a3}.rewrite-output{margin-top:1rem;background:#f8fafc;border:1.5px solid #e5e7eb;border-radius:16px;padding:1rem}
@media(max-width:430px){.bottom-nav{gap:0}.nav-label{font-size:.62rem}.phd-hero{align-items:flex-start}.phd-hero-icon{width:48px;height:48px;border-radius:18px}.phd-hero h1{font-size:1.12rem}.phd-panel-card{padding:1rem}.timeline-row{display:block}.timeline-row b{display:block;margin-bottom:.2rem}}