/* ── Theme Variables ── */
:root {
    --bg: #F8F9FA;
    --bg-card: #FFFFFF;
    --text: #1B2A4A;
    --text-muted: #5A6B8A;
    --accent: #2B5CE6;
    --accent-hover: #1E4AD4;
    --accent-soft: #EEF2FF;
    --green: #0D9F6E;
    --green-soft: #D1FAE5;
    --orange: #E8740C;
    --orange-soft: #FEF3C7;
    --purple: #7C3AED;
    --purple-soft: #F3E8FF;
    --border: #E2E8F0;
    --font-d: 'Space Grotesk', system-ui, sans-serif;
    --font-b: 'Inter', system-ui, sans-serif;
    --rl: 16px;
    --sh: 0 1px 3px rgba(27,42,74,.06), 0 1px 2px rgba(27,42,74,.04);
    --shm: 0 4px 12px rgba(27,42,74,.08);
    --shl: 0 12px 32px rgba(27,42,74,.1);
    --header-bg: rgba(248,249,250,.92);
    --nav-bg: rgba(248,249,250,.98);
    --focus-ring: rgba(43,92,230,.15);
    --cta-from: #1B2A4A;
    --cta-to: #0F172A;
    --table-header-bg: var(--bg);
    --code-bg: #f1f5f9;
}

[data-theme="dark"] {
    --bg: #0F172A;
    --bg-card: #1E293B;
    --text: #F1F5F9;
    --text-muted: #94A3B8;
    --accent: #60A5FA;
    --accent-hover: #3B82F6;
    --accent-soft: #1E3A5F;
    --green: #34D399;
    --green-soft: #064E3B;
    --orange: #FB923C;
    --orange-soft: #78350F;
    --purple: #A78BFA;
    --purple-soft: #2E1065;
    --border: #334155;
    --header-bg: rgba(15,23,42,.92);
    --nav-bg: rgba(15,23,42,.98);
    --sh: 0 1px 3px rgba(0,0,0,.3), 0 1px 2px rgba(0,0,0,.2);
    --shm: 0 4px 12px rgba(0,0,0,.4);
    --shl: 0 12px 32px rgba(0,0,0,.5);
    --focus-ring: rgba(96,165,250,.25);
    --cta-from: #1E293B;
    --cta-to: #0F172A;
    --table-header-bg: #1a2540;
    --code-bg: #1a2540;
}

/* ── Transition for theme switch ── */
html.theme-transition,
html.theme-transition *,
html.theme-transition *::before,
html.theme-transition *::after {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease !important;
}

/* ── Header Theme Toggle ── */
.theme-toggle-header {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: transparent;
    cursor: pointer;
    color: var(--text-muted);
    transition: background .15s, color .15s, border-color .15s;
    flex-shrink: 0;
}
.theme-toggle-header:hover {
    background: var(--accent-soft);
    color: var(--text);
    border-color: var(--accent);
}
.theme-toggle-header svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.theme-toggle-header .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle-header .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle-header .icon-moon { display: none; }

/* ── Floating Theme Toggle ── */
.theme-toggle-float {
    position: fixed;
    bottom: 96px;
    right: 34px;
    z-index: 91;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--bg-card);
    cursor: pointer;
    color: var(--text-muted);
    display: grid;
    place-items: center;
    box-shadow: var(--shm);
    transition: background .15s, color .15s, border-color .15s, transform .2s;
}
.theme-toggle-float:hover {
    background: var(--accent-soft);
    color: var(--text);
    border-color: var(--accent);
    transform: scale(1.08);
}
.theme-toggle-float svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.theme-toggle-float .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle-float .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle-float .icon-moon { display: none; }

/* ── WhatsApp Float ── */
.wa-float { position:fixed; bottom:1.5rem; right:1.5rem; z-index:90; }
.wa-btn { width:56px; height:56px; border-radius:50%; background:#25D366; border:none; cursor:pointer; display:grid; place-items:center; box-shadow:0 4px 16px rgba(37,211,102,.35); transition:transform .2s, box-shadow .2s; }
.wa-btn:hover { transform:scale(1.08); box-shadow:0 6px 24px rgba(37,211,102,.45); }
.wa-btn svg { width:28px; height:28px; fill:#fff; }
.wa-menu { position:absolute; bottom:68px; right:0; background:var(--bg-card); border:1px solid var(--border); border-radius:12px; box-shadow:var(--shl); width:260px; opacity:0; visibility:hidden; transform:translateY(8px); transition:all .2s; }
.wa-menu.open { opacity:1; visibility:visible; transform:translateY(0); }
.wa-menu-head { padding:.875rem 1rem; border-bottom:1px solid var(--border); }
.wa-menu-head p { font-size:.75rem; color:var(--text-muted); margin:0; }
.wa-menu-head strong { font-size:.8125rem; color:var(--text); font-weight:600; display:block; margin-bottom:.125rem; }
.wa-menu-list { padding:.5rem; }
.wa-menu-item { display:flex; align-items:center; gap:.75rem; padding:.625rem .5rem; border-radius:8px; text-decoration:none; color:var(--text); transition:background .15s; }
.wa-menu-item:hover { background:var(--bg); }
.wa-menu-avatar { width:36px; height:36px; border-radius:50%; background:var(--green-soft); display:grid; place-items:center; flex-shrink:0; }
.wa-menu-avatar svg { width:18px; height:18px; stroke:var(--green); }
.wa-menu-name { font-size:.8125rem; font-weight:600; }
.wa-menu-phone { font-size:.6875rem; color:var(--text-muted); }

/* ── Responsive adjustments for theme toggle ── */
@media (max-width: 640px) {
    .theme-toggle-float {
        bottom: 84px;
        right: 26px;
        width: 40px;
        height: 40px;
    }
    .theme-toggle-float svg {
        width: 18px;
        height: 18px;
    }
    .wa-float { bottom:1rem; right:1rem; }
    .wa-btn { width:50px; height:50px; }
    .wa-btn svg { width:24px; height:24px; }
    .wa-menu { width:240px; right:-0.5rem; }
}

/* ── Dark mode fixes for common elements ── */
[data-theme="dark"] .hdr {
    background: var(--header-bg);
}
[data-theme="dark"] .nav-m {
    background: var(--nav-bg);
}

/* Fix for info-table header rows */
[data-theme="dark"] .info-table th,
[data-theme="dark"] th {
    background: var(--table-header-bg);
}

/* Fix for code blocks */
[data-theme="dark"] code {
    background: var(--code-bg);
}

/* Fix for select dropdown arrow */
[data-theme="dark"] .form-group select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
}

/* Fix for images that might have white backgrounds */
[data-theme="dark"] img {
    opacity: 0.92;
}
[data-theme="dark"] .logo img {
    opacity: 1;
}