/* ═══════════════════════════════════════════════════════
   InterviewSaathi v6 — WORLD-CLASS DESIGN SYSTEM
   Deep dark theme · Depth & glow · Mobile-first
   Font: Plus Jakarta Sans · Accent: #FF6A1A
   ═══════════════════════════════════════════════════════ */
/* ══ LIGHT THEME (default) ══ */
:root{
  --bg:#F6F5F2;--bg2:#FFFFFF;--bg3:#FAFAF8;
  --surface:#FFFFFF;--surface2:#F5F4F1;--surface3:#EEEDE9;
  --card:#FFFFFF;--card-b:rgba(0,0,0,0.07);
  --card-h:rgba(0,0,0,0.03);--card-b-h:rgba(0,0,0,0.12);
  --text:#1A1A1A;--text2:#555555;--text3:#888888;--text4:#AAAAAA;
  --accent:#FF6A1A;--accent2:#FF8A44;--accent-m:rgba(255,106,26,0.08);--accent-b:rgba(255,106,26,0.14);
  --accent-glow:rgba(255,106,26,0.1);--accent-soft:rgba(255,106,26,0.06);
  --green:#10B981;--green-m:rgba(16,185,129,0.08);
  --blue:#3B82F6;--blue-m:rgba(59,130,246,0.08);
  --purple:#8B5CF6;--purple-m:rgba(139,92,246,0.08);
  --amber:#F59E0B;--amber-m:rgba(245,158,11,0.08);
  --teal:#14B8A6;--teal-m:rgba(20,184,166,0.08);
  --pink:#EC4899;--pink-m:rgba(236,72,153,0.08);
  --red:#EF4444;--red-m:rgba(239,68,68,0.08);
  --gold:#F59E0B;--gold-m:rgba(245,158,11,0.08);
  --r:10px;--r2:14px;--r3:18px;--r4:24px;
  --ease:cubic-bezier(.16,1,.3,1);--ease-out:cubic-bezier(.33,1,.68,1)
}
/* ══ DARK THEME ══ */
[data-theme="dark"]{
  --bg:#08070A;--bg2:#0D0C10;--bg3:#111015;
  --surface:#16151B;--surface2:#1C1B22;--surface3:#222129;
  --card:rgba(255,255,255,0.03);--card-b:rgba(255,255,255,0.06);
  --card-h:rgba(255,255,255,0.055);--card-b-h:rgba(255,255,255,0.12);
  --text:#EDECF0;--text2:rgba(237,236,240,0.6);--text3:rgba(237,236,240,0.32);--text4:rgba(237,236,240,0.14);
  --accent:#FF6A1A;--accent2:#FF8A44;--accent-m:rgba(255,106,26,0.1);--accent-b:rgba(255,106,26,0.16);
  --accent-glow:rgba(255,106,26,0.15);--accent-soft:rgba(255,106,26,0.08);
  --green:#00D68F;--green-m:rgba(0,214,143,0.1);
  --blue:#4C9AFF;--blue-m:rgba(76,154,255,0.1);
  --purple:#9B7AFF;--purple-m:rgba(155,122,255,0.1);
  --amber:#FFB020;--amber-m:rgba(255,176,32,0.1);
  --teal:#00C9B7;--teal-m:rgba(0,201,183,0.1);
  --pink:#F472B6;--pink-m:rgba(244,114,182,0.1);
  --red:#FF5C5C;--red-m:rgba(255,92,92,0.1);
  --gold:#F59E0B;--gold-m:rgba(245,158,11,0.1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Plus Jakarta Sans','Inter',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.6;font-size:14px}
::-webkit-scrollbar{width:5px;height:5px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--text4);border-radius:10px}
::selection{background:rgba(255,106,26,0.25)}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3,h4{font-weight:700;letter-spacing:-0.03em;line-height:1.15}
h1{font-size:clamp(2rem,4.5vw,3.2rem)}
h2{font-size:clamp(1.5rem,3vw,2rem)}
h3{font-size:1.125rem}
.text-accent{color:var(--accent)}
.text-muted{color:var(--text2)}
.text-dim{color:var(--text3)}
.overline{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--accent)}
.nav{position:sticky;top:0;z-index:200;height:56px;display:flex;align-items:center;padding:0 28px;gap:12px;background:rgba(8,7,10,0.88);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--card-b)}
.nav-brand{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:700;letter-spacing:-0.02em}
.nav-brand img{height:28px;border-radius:8px}
.nav-brand span{color:var(--accent)}
.nav-links{display:flex;gap:2px;margin-left:auto;list-style:none}
.nav-link{padding:7px 14px;border-radius:8px;font-size:12px;font-weight:500;color:var(--text3);cursor:pointer;transition:all .15s;border:none;background:none;font-family:inherit}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,0.03)}
.nav-actions{display:flex;gap:8px;margin-left:8px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 22px;border-radius:var(--r);font-family:inherit;font-size:12px;font-weight:600;cursor:pointer;border:none;transition:all .2s var(--ease);white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--accent),#E55D10);color:#fff;box-shadow:0 2px 12px rgba(255,106,26,0.2)}
.btn-primary:hover{filter:brightness(1.1);transform:translateY(-1px);box-shadow:0 4px 20px rgba(255,106,26,0.3)}
.btn-secondary{background:var(--card);color:var(--text2);border:1px solid var(--card-b)}
.btn-secondary:hover{border-color:var(--accent-b);color:var(--accent)}
.btn-ghost{background:transparent;color:var(--text2);border:1px solid var(--card-b)}
.btn-ghost:hover{border-color:var(--card-b-h);color:var(--text)}
.btn-lg{padding:12px 28px;font-size:14px;border-radius:var(--r2)}
.btn-sm{padding:6px 14px;font-size:11px}
.btn:disabled{opacity:.35;cursor:not-allowed;transform:none!important}
.card{background:var(--card);border:1px solid var(--card-b);border-radius:var(--r3);padding:22px;transition:all .25s var(--ease)}
.card:hover{border-color:var(--card-b-h)}
.card-interactive{cursor:pointer}
.card-interactive:hover{transform:translateY(-2px);border-color:var(--accent-b)}
.form-group{margin-bottom:14px}
.form-label{display:block;font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--text3);margin-bottom:5px}
.form-input{width:100%;padding:10px 14px;background:rgba(255,255,255,0.02);border:1px solid var(--card-b);border-radius:var(--r);color:var(--text);font-size:13px;font-family:inherit;outline:none;transition:border-color .2s}
.form-input:focus{border-color:var(--accent)}
.form-input::placeholder{color:var(--text4)}
.form-input:disabled{color:var(--text4);background:var(--bg2)}
textarea.form-input{resize:vertical;min-height:80px}
select.form-input{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 24 24' fill='none' stroke='%235A5F78' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:32px}
.badge{display:inline-flex;align-items:center;gap:3px;padding:2px 8px;border-radius:99px;font-size:10px;font-weight:700;letter-spacing:.02em}
.badge-accent{background:var(--accent-m);color:var(--accent)}
.badge-green{background:var(--green-m);color:var(--green)}
.badge-blue{background:var(--blue-m);color:var(--blue)}
.badge-purple{background:var(--purple-m);color:var(--purple)}
.badge-amber{background:var(--amber-m);color:var(--amber)}
.badge-red{background:var(--red-m);color:var(--red)}
.badge-pro{background:var(--gold-m);color:var(--gold)}
.container{max-width:1100px;margin:0 auto;padding:0 28px}
.container-sm{max-width:800px;margin:0 auto;padding:0 28px}
.container-xs{max-width:560px;margin:0 auto;padding:0 28px}
.section{padding:80px 0}
.section-label{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--accent);margin-bottom:10px;display:flex;align-items:center;gap:8px}
.section-label::before{content:'';width:16px;height:1.5px;background:var(--accent);border-radius:1px}
.section-title{font-size:clamp(1.5rem,3vw,2.25rem);font-weight:700;letter-spacing:-0.03em;margin-bottom:10px}
.section-sub{font-size:14px;color:var(--text2);line-height:1.7;max-width:520px}
.toast{position:fixed;bottom:20px;right:20px;padding:12px 20px;border-radius:var(--r2);font-size:12px;font-weight:500;z-index:9999;animation:toastIn .3s var(--ease);border:1px solid;backdrop-filter:blur(12px);box-shadow:0 8px 32px rgba(0,0,0,0.3)}
.toast.success{background:rgba(0,214,143,0.08);border-color:rgba(0,214,143,0.15);color:var(--green)}
.toast.error{background:rgba(255,92,92,0.08);border-color:rgba(255,92,92,0.15);color:var(--red)}
.toast.info{background:rgba(76,154,255,0.08);border-color:rgba(76,154,255,0.15);color:var(--blue)}
.toast.warning{background:rgba(255,176,32,0.08);border-color:rgba(255,176,32,0.15);color:var(--amber)}
@keyframes toastIn{from{transform:translateY(12px) scale(.95);opacity:0}to{transform:translateY(0) scale(1);opacity:1}}
.skeleton{background:rgba(255,255,255,0.03);border-radius:var(--r);animation:pulse 1.5s ease infinite}
@keyframes pulse{0%,100%{opacity:.3}50%{opacity:.7}}
.empty-state{text-align:center;padding:60px 20px}
.empty-state .icon{font-size:48px;margin-bottom:16px}
.empty-state .title{font-size:18px;font-weight:700;margin-bottom:8px}
.empty-state .desc{font-size:13px;color:var(--text2);margin-bottom:24px;line-height:1.7}
.modal-backdrop{display:none;position:fixed;inset:0;z-index:500;background:rgba(8,7,10,0.8);backdrop-filter:blur(8px);align-items:center;justify-content:center;padding:20px}
.modal-content{background:var(--surface);border:1px solid var(--card-b);border-radius:var(--r4);padding:32px;max-width:520px;width:100%;max-height:90vh;overflow-y:auto;position:relative;box-shadow:0 24px 64px rgba(0,0,0,0.4)}
.modal-close{position:absolute;top:16px;right:16px;width:32px;height:32px;border-radius:8px;border:1px solid var(--card-b);background:none;color:var(--text3);cursor:pointer;font-size:14px;display:flex;align-items:center;justify-content:center;transition:all .15s}
.modal-close:hover{border-color:var(--card-b-h);color:var(--text)}
.avatar-overlay{position:fixed;inset:0;z-index:600;background:rgba(8,7,10,0.85);backdrop-filter:blur(12px);display:flex;align-items:center;justify-content:center}
.avatar-modal{text-align:center;padding:48px;border-radius:var(--r4);background:var(--surface);border:1px solid var(--card-b);max-width:420px;width:100%;box-shadow:0 24px 64px rgba(0,0,0,0.5)}
.avatar-greeting{font-size:24px;font-weight:800;letter-spacing:-0.03em;margin-bottom:8px}
.avatar-sub{font-size:14px;color:var(--text2);line-height:1.7;margin-bottom:28px}
.avatar-dismiss{width:100%}
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.visible{opacity:1;transform:translateY(0)}
.nav.scrolled{border-color:rgba(255,255,255,0.1);box-shadow:0 4px 24px rgba(0,0,0,0.2)}
.title-sm{font-size:14px;font-weight:600}
.title-lg{font-size:20px;font-weight:700;letter-spacing:-0.02em}
.display-md{font-size:28px;font-weight:800;letter-spacing:-0.04em}
.body-sm{font-size:12px;line-height:1.6}
.body-md{font-size:14px;line-height:1.7}
.caption{font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--text3)}
.tab{padding:7px 14px;border-radius:8px;font-size:12px;font-weight:500;color:var(--text3);cursor:pointer;transition:all .15s;border:none;background:none;font-family:inherit}
.tab.active{color:var(--accent);background:var(--accent-soft)}
.tab:hover:not(.active){color:var(--text2);background:rgba(255,255,255,0.03)}
@media(max-width:768px){
  .nav{padding:0 16px;height:50px}
  .container,.container-sm,.container-xs{padding:0 16px}
  .section{padding:48px 0}
  .card{padding:16px;border-radius:var(--r2)}
  .modal-content{padding:24px;border-radius:var(--r3)}
}