/* ===== الثيمات: فاتح / داكن / ليلي ===== */
:root,
:root[data-theme="light"] {
    --bg:        #f6f8fb;
    --bg-elev:   #ffffff;
    --surface:   #ffffff;
    --border:    #e4e8ef;
    --text:      #1a2230;
    --text-dim:  #5b6676;
    --primary:   #4f46e5;
    --primary-2: #7c3aed;
    --primary-ct:#ffffff;
    --accent:    #0ea5e9;
    --shadow:    0 6px 24px rgba(20,30,60,.08);
    --radius:    14px;
}
:root[data-theme="dark"] {
    --bg:        #0f1420;
    --bg-elev:   #161d2c;
    --surface:   #161d2c;
    --border:    #263045;
    --text:      #e8edf5;
    --text-dim:  #9aa6ba;
    --primary:   #6366f1;
    --primary-2: #8b5cf6;
    --primary-ct:#ffffff;
    --accent:    #38bdf8;
    --shadow:    0 8px 30px rgba(0,0,0,.35);
    --radius:    14px;
}
/* الليلي: أغمق وأدفأ، لراحة العين */
:root[data-theme="night"] {
    --bg:        #05070d;
    --bg-elev:   #0b0f18;
    --surface:   #0b0f18;
    --border:    #1a2130;
    --text:      #c8d0de;
    --text-dim:  #76808f;
    --primary:   #5b63d6;
    --primary-2: #7c4ddb;
    --primary-ct:#f2f4fa;
    --accent:    #2b8fc7;
    --shadow:    0 8px 30px rgba(0,0,0,.55);
    --radius:    14px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: 'Cairo', 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    transition: background .25s ease, color .25s ease;
}
[dir="ltr"] body { font-family: 'Inter', 'Cairo', system-ui, sans-serif; }

a { color: inherit; text-decoration: none; }
.container { width: min(1140px, 92%); margin-inline: auto; }

/* ===== الهيدر ===== */
.site-header {
    position: sticky; top: 0; z-index: 50;
    background: color-mix(in srgb, var(--bg-elev) 88%, transparent);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 20px; height: 66px; }
.brand {
    font-weight: 800; font-size: 1.3rem;
    background: linear-gradient(90deg, var(--primary), var(--primary-2));
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.main-nav { display: flex; gap: 18px; margin-inline-start: 8px; }
.main-nav a { color: var(--text-dim); font-weight: 600; transition: color .2s; }
.main-nav a:hover { color: var(--text); }
.main-nav a { position: relative; display: inline-flex; align-items: center; gap: 6px; }
/* شارة غير المقروء (تذاكر الدعم) */
.tk-badge {
    min-width: 18px; height: 18px; padding: 0 5px; border-radius: 9px;
    background: #ef4444; color: #fff; font-size: .68rem; font-weight: 800;
    display: inline-grid; place-items: center; line-height: 1;
}
.header-actions { display: flex; align-items: center; gap: 10px; margin-inline-start: auto; }

.lang-switch { display: flex; gap: 2px; background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 3px; }
.lang-switch a { font-size: .72rem; font-weight: 700; color: var(--text-dim); padding: 3px 7px; border-radius: 7px; }
.lang-switch a.active { background: var(--primary); color: var(--primary-ct); }

.theme-btn {
    width: 38px; height: 38px; border-radius: 10px;
    border: 1px solid var(--border); background: var(--bg);
    color: var(--text); cursor: pointer; font-size: 1.1rem;
    display: grid; place-items: center; transition: .2s;
}
.theme-btn:hover { border-color: var(--primary); color: var(--primary); }

/* ===== الأزرار ===== */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 9px 18px; border-radius: 10px; font-weight: 700; font-size: .92rem;
    border: 1px solid transparent; cursor: pointer; transition: .2s; white-space: nowrap;
}
.btn-primary { background: linear-gradient(90deg, var(--primary), var(--primary-2)); color: var(--primary-ct); }
.btn-primary:hover { filter: brightness(1.08); transform: translateY(-1px); }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-lg { padding: 13px 28px; font-size: 1.02rem; }

/* ===== الهيرو ===== */
.hero { padding: 72px 0 48px; text-align: center; position: relative; overflow: hidden; }
.hero::before {
    content: ''; position: absolute; inset: -40% 10% auto; height: 420px;
    background: radial-gradient(60% 60% at 50% 0, color-mix(in srgb, var(--primary) 28%, transparent), transparent 70%);
    pointer-events: none; z-index: 0;
}
.hero > * { position: relative; z-index: 1; }
.hero h1 { font-size: clamp(1.9rem, 4.5vw, 3.1rem); font-weight: 800; margin: 0 0 14px; letter-spacing: -.5px; }
.hero p { color: var(--text-dim); font-size: 1.12rem; max-width: 620px; margin: 0 auto 28px; }

/* ===== الميزات ===== */
.features { padding: 40px 0 80px; }
.features h2 { text-align: center; font-size: 1.6rem; margin-bottom: 28px; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.feature-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 26px; box-shadow: var(--shadow); transition: transform .2s, border-color .2s;
}
.feature-card:hover { transform: translateY(-4px); border-color: var(--primary); }
.feature-card .ico {
    width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-2)); color: #fff; font-size: 1.4rem; margin-bottom: 14px;
}
.feature-card h3 { margin: 0 0 8px; font-size: 1.12rem; }
.feature-card p { margin: 0; color: var(--text-dim); font-size: .95rem; }

/* ===== نماذج المصادقة ===== */
.auth-wrap { display: grid; place-items: center; padding: 56px 16px; }
.auth-card {
    width: 100%; max-width: 400px; background: var(--surface);
    border: 1px solid var(--border); border-radius: var(--radius);
    padding: 32px 28px; box-shadow: var(--shadow);
}
.auth-card h1 { margin: 0 0 18px; font-size: 1.5rem; text-align: center; }
.auth-hint { color: var(--text-dim); font-size: .9rem; text-align: center; margin: -8px 0 16px; }
.auth-card label { display: block; margin-bottom: 14px; font-size: .9rem; font-weight: 600; color: var(--text-dim); }
.auth-card input {
    width: 100%; margin-top: 6px; padding: 11px 13px; border-radius: 10px;
    border: 1px solid var(--border); background: var(--bg); color: var(--text);
    font-family: inherit; font-size: .98rem; transition: border-color .2s;
}
.auth-card input:focus { outline: none; border-color: var(--primary); }
.btn-block { width: 100%; margin-top: 6px; }
.auth-alt { text-align: center; margin: 16px 0 0; font-size: .9rem; }
.auth-alt a { color: var(--primary); font-weight: 600; }
.alert { padding: 11px 14px; border-radius: 10px; font-size: .9rem; margin-bottom: 16px; }
.alert-error { background: color-mix(in srgb, #ef4444 15%, var(--surface)); border: 1px solid #ef4444; color: #ef4444; }
.alert-success { background: color-mix(in srgb, #22c55e 15%, var(--surface)); border: 1px solid #22c55e; color: #16a34a; }

/* ===== الفوتر ===== */
.site-footer { border-top: 1px solid var(--border); padding: 24px 0; color: var(--text-dim); font-size: .9rem; text-align: center; }

/* ===== صفحات الأخطاء ===== */
.error-page { text-align: center; padding: 100px 0; }
.error-page .code { font-size: 4rem; font-weight: 800; color: var(--primary); }
.error-page h1 { margin: 6px 0 10px; }
.error-page p { color: var(--text-dim); margin-bottom: 24px; }

@media (max-width: 720px) {
    .main-nav { display: none; }
    .header-actions .btn-ghost { display: none; }
}