/* ═══════════════════════════════════════════
   SHARED STYLES — AI & Python Training V2
═══════════════════════════════════════════ */
:root{
  --bg:#060B18;--bg2:#0A1020;--card:#0D1526;--card2:#111D35;
  --brd:rgba(99,179,255,.10);--brd2:rgba(99,179,255,.22);
  --blue:#3B82F6;--b2:#60A5FA;--b3:#93C5FD;
  --purple:#8B5CF6;--p2:#A78BFA;
  --cyan:#06B6D4;--c2:#22D3EE;
  --green:#10B981;--g2:#34D399;
  --orange:#F59E0B;--o2:#FCD34D;
  --red:#EF4444;--r2:#F87171;
  --white:#fff;--text:#E2E8F0;--muted:#94A3B8;--dim:#475569;
  --grad1:linear-gradient(135deg,#3B82F6,#8B5CF6);
  --grad2:linear-gradient(135deg,#06B6D4,#3B82F6);
  --grad3:linear-gradient(135deg,#8B5CF6,#EC4899);
  --glow:0 0 40px rgba(59,130,246,.2);
  --r:10px;--r2:18px;--r3:28px;
  --tr:.3s cubic-bezier(.4,0,.2,1);
  --fh:'Space Grotesk',sans-serif;
  --fn:'Inter',sans-serif;
  --fm:'JetBrains Mono',monospace;
}

[data-theme="light"] {
  --bg: #F8FAFC;
  --bg2: #F1F5F9;
  --card: #FFFFFF;
  --card2: #F8FAFC;
  --brd: rgba(148, 163, 184, 0.24);
  --brd2: rgba(59, 130, 246, 0.32);
  --blue: #2563EB;
  --b2: #3B82F6;
  --b3: #1D4ED8;
  --text: #1E293B;
  --txt: #1E293B;
  --white: #0F172A;
  --muted: #475569;
  --mut: #475569;
  --dim: #64748B;
  --glow: 0 4px 20px rgba(37, 99, 235, 0.1);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--fn);background:var(--bg);color:var(--text);overflow-x:hidden;min-height:100vh}

/* Typography */
h1,h2,h3,h4,h5,h6{font-family:var(--fh);font-weight:700;line-height:1.2}
.grad-txt{background:var(--grad1);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.grad-cyan{background:var(--grad2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}

/* Section Header */
.sec-head{text-align:center;max-width:680px;margin:0 auto 48px}
.sec-tag{display:inline-flex;align-items:center;gap:7px;background:rgba(59,130,246,.10);border:1px solid var(--brd2);border-radius:50px;padding:5px 16px;font-size:.75rem;font-weight:600;color:var(--b2);text-transform:uppercase;letter-spacing:.08em;margin-bottom:14px}
.sec-title{font-size:clamp(1.8rem,4vw,2.6rem);margin-bottom:14px;color:var(--white)}
.sec-sub{font-size:1rem;color:var(--muted);line-height:1.65}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 26px;border-radius:50px;font-family:var(--fh);font-weight:600;font-size:.9rem;text-decoration:none;cursor:pointer;border:none;transition:var(--tr)}
.btn-p{background:var(--grad1);color:#fff!important;box-shadow:0 0 24px rgba(59,130,246,.35)}
.btn-p:hover{transform:translateY(-2px);box-shadow:0 0 36px rgba(59,130,246,.55);opacity:.95}
.btn-o{background:transparent;border:1.5px solid var(--brd2);color:var(--text);border-radius:50px;padding:11px 24px;text-decoration:none;display:inline-flex;align-items:center;gap:8px;font-family:var(--fh);font-weight:600;font-size:.9rem;transition:all .2s;cursor:pointer}
.btn-o:hover{border-color:var(--blue);color:var(--b2);background:rgba(59,130,246,.08)}
.btn-c{background:var(--grad2);color:#fff!important}
.btn-c:hover{transform:translateY(-2px);opacity:.95}

/* Cards & Containers */
.card{background:var(--card);border:1px solid var(--brd);border-radius:var(--r2);transition:var(--tr)}
.card:hover{border-color:var(--brd2);box-shadow:var(--glow)}
.card-glow{background:var(--card);border:1px solid var(--brd2);border-radius:var(--r2);box-shadow:var(--glow)}

/* Page Hero banner */
.page-hero{padding:120px 0 60px;text-align:center;position:relative}
.page-hero::before{content:'';position:absolute;top:0;left:50%;transform:translateX(-50%);width:700px;height:350px;background:radial-gradient(ellipse at top,rgba(59,130,246,.15),transparent 70%);pointer-events:none}
.page-hero h1{font-size:clamp(2rem,5vw,3.2rem);color:var(--white);margin-bottom:16px}
.page-hero p{font-size:1.05rem;color:var(--muted);max-width:580px;margin:0 auto 28px;line-height:1.65}

/* Form inputs */
.fi{width:100%;background:rgba(255,255,255,.04);border:1.5px solid var(--brd);border-radius:var(--r);padding:12px 16px;color:var(--text);font-size:.92rem;font-family:var(--fn);transition:border-color .2s}
.fi:focus{outline:none;border-color:var(--blue);background:rgba(59,130,246,.04)}
.fi::placeholder{color:var(--dim)}
select.fi option{background:var(--bg2);color:var(--text)}

/* Badges */
.badge{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border-radius:50px;font-size:.72rem;font-weight:600}
.b-blue{background:rgba(59,130,246,.15);color:var(--b2);border:1px solid rgba(59,130,246,.3)}
.b-green{background:rgba(16,185,129,.15);color:var(--g2);border:1px solid rgba(16,185,129,.3)}
.b-purple{background:rgba(139,92,246,.15);color:var(--p2);border:1px solid rgba(139,92,246,.3)}
.b-orange{background:rgba(245,158,11,.15);color:var(--o2);border:1px solid rgba(245,158,11,.3)}

/* Shared Footer */
.sf-foot{background:#040711;border-top:1px solid var(--brd);padding:60px 0 30px;margin-top:80px}
.sf-brand{font-family:var(--fh);font-size:1.15rem;font-weight:700;color:var(--white);display:flex;align-items:center;gap:9px;margin-bottom:12px}
.sf-brand span{background:var(--grad1);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.sf-desc{color:var(--muted);font-size:.85rem;line-height:1.65;max-width:280px;margin-bottom:20px}
.sf-h{font-family:var(--fh);font-size:.85rem;font-weight:700;color:var(--white);text-transform:uppercase;letter-spacing:.08em;margin-bottom:16px}
.sf-links{list-style:none;display:flex;flex-direction:column;gap:9px}
.sf-links a{color:var(--muted);text-decoration:none;font-size:.85rem;transition:color .2s}
.sf-links a:hover{color:var(--b2)}
.sf-copy{border-top:1px solid var(--brd);padding-top:24px;margin-top:40px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;font-size:.8rem;color:var(--dim)}

/* WA FAB */
.wa-fab{position:fixed;bottom:24px;right:24px;width:56px;height:56px;background:#25D366;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.6rem;box-shadow:0 4px 20px rgba(37,211,102,.45);z-index:999;transition:all .25s;text-decoration:none}
.wa-fab:hover{transform:scale(1.1);color:#fff}

/* ─── COMPREHENSIVE LIGHT MODE OVERRIDES ─── */
[data-theme="light"] body { background: var(--bg); color: var(--text); }
[data-theme="light"] h1, [data-theme="light"] h2, [data-theme="light"] h3, [data-theme="light"] h4, [data-theme="light"] h5, [data-theme="light"] strong, [data-theme="light"] b {
  color: #0F172A !important;
}
[data-theme="light"] .card,
[data-theme="light"] .card-glow,
[data-theme="light"] .box,
[data-theme="light"] .panel,
[data-theme="light"] .sf-foot {
  background: #FFFFFF !important;
  border-color: rgba(148, 163, 184, 0.24) !important;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.05);
}
[data-theme="light"] .sf-foot {
  background: #EDF2F7 !important;
  border-top-color: rgba(148, 163, 184, 0.28) !important;
}
[data-theme="light"] .btn-o {
  color: #0F172A !important;
  border-color: rgba(148, 163, 184, 0.45) !important;
  background: #FFFFFF !important;
}
[data-theme="light"] .btn-o:hover {
  color: #2563EB !important;
  border-color: #2563EB !important;
  background: #EFF6FF !important;
}
[data-theme="light"] .fi {
  background: #F8FAFC !important;
  border-color: rgba(148, 163, 184, 0.35) !important;
  color: #0F172A !important;
}
[data-theme="light"] .fi:focus {
  background: #FFFFFF !important;
  border-color: var(--blue) !important;
}
[data-theme="light"] select.fi option {
  background: #FFFFFF !important;
  color: #0F172A !important;
}