/*
Theme Name: CalcHub Pro
Theme URI: 
Author: 
Description: Advanced WordPress theme for CalcHub - 120+ Free Online Calculators
Version: 3.0
License: GPL v2 or later
Text Domain: calchub
*/

/* ===== Design System ===== */
:root {
    --bg: #eef0f5;
    --bg-card: #ffffff;
    --text-primary: #0b1121;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --accent-soft: #eef2ff;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    --accent-gradient-2: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    --accent-glow: rgba(99,102,241,0.25);
    --border: #e2e8f0;
    --border-focus: #6366f1;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.02);
    --shadow: 0 3px 6px rgba(0,0,0,0.05), 0 1px 3px rgba(0,0,0,0.03);
    --shadow-md: 0 6px 12px -2px rgba(0,0,0,0.06), 0 3px 6px -2px rgba(0,0,0,0.03);
    --shadow-lg: 0 12px 28px -4px rgba(0,0,0,0.08), 0 4px 12px -2px rgba(0,0,0,0.04);
    --shadow-xl: 0 24px 48px -8px rgba(0,0,0,0.1);
    --shadow-glow: 0 0 20px var(--accent-glow);
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --sidebar-w: 260px;
    --header-h: 56px;
    --font: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --glass-bg: rgba(255,255,255,0.72);
    --glass-border: rgba(255,255,255,0.18);
    --glass-shadow: 0 8px 32px rgba(0,0,0,0.06);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0b0e17;
        --bg-card: #131822;
        --text-primary: #eef2f6;
        --text-secondary: #8899b4;
        --text-muted: #5a6a85;
        --accent-soft: #191e3a;
        --border: #1e2538;
        --glass-bg: rgba(19,24,34,0.85);
        --glass-border: rgba(255,255,255,0.06);
        --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
        --shadow: 0 3px 6px rgba(0,0,0,0.3);
        --shadow-md: 0 8px 16px rgba(0,0,0,0.35);
        --shadow-lg: 0 16px 32px rgba(0,0,0,0.4);
        --shadow-xl: 0 28px 56px rgba(0,0,0,0.5);
        --accent-glow: rgba(99,102,241,0.15);
    }
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0f1117;
        --bg-card: #1a1d27;
        --text-primary: #f1f5f9;
        --text-secondary: #94a3b8;
        --text-muted: #64748b;
        --accent-soft: #1e1b4b;
        --border: #2d3140;
        --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
        --shadow: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
        --shadow-md: 0 4px 6px rgba(0,0,0,0.3);
        --shadow-lg: 0 10px 25px rgba(0,0,0,0.4);
    }
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text-primary);
    display: flex;
    min-height: 100vh;
    line-height: 1.6;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background-image:
        radial-gradient(ellipse at 20% 10%, rgba(99,102,241,0.04) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 90%, rgba(139,92,246,0.04) 0%, transparent 50%);
}

::selection { background: var(--accent); color: #fff; }

body.admin-bar { min-height: calc(100vh - 32px); }

/* ===== App Layout ===== */
.app-container { display: flex; flex: 1; position: relative; }

/* ===== Sidebar ===== */
.sidebar {
    width: var(--sidebar-w);
    background: var(--glass-bg);
    backdrop-filter: blur(16px) saturate(1.4);
    -webkit-backdrop-filter: blur(16px) saturate(1.4);
    border-right: 1px solid var(--glass-border);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 200;
    padding: 0;
    transition: transform var(--transition-slow), background var(--transition-slow);
    display: flex;
    flex-direction: column;
    box-shadow: 1px 0 10px rgba(0,0,0,0.02);
}

body.admin-bar .sidebar { top: 32px; height: calc(100vh - 32px); }

.sidebar-header {
    padding: 20px 20px 14px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-logo {
    font-weight: 800;
    font-size: 1.35rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.03em;
}

.sidebar-logo-badge {
    font-size: 0.55rem;
    background: linear-gradient(135deg, #6366f1, #a855f7);
    color: #fff;
    padding: 2px 10px;
    border-radius: 20px;
    font-weight: 700;
    -webkit-text-fill-color: #fff;
    letter-spacing: 0.04em;
}

.sidebar-search-wrap {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border);
}

.sidebar-search {
    width: 100%;
    padding: 9px 12px 9px 36px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 0.78rem;
    background: var(--bg);
    color: var(--text-primary);
    transition: all var(--transition);
}

.sidebar-search:focus {
    border-color: var(--accent);
    outline: none;
    box-shadow: 0 0 0 3px rgba(99,102,241,0.12);
}

.sidebar-search-wrap { position: relative; }
.sidebar-search-wrap::before {
    content: '🔍';
    position: absolute;
    left: 22px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.65rem;
    pointer-events: none;
    opacity: 0.5;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 8px 10px;
}

.sidebar .cat-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 10px 14px;
    border: none;
    background: transparent;
    cursor: pointer;
    border-radius: 10px;
    font-size: 0.82rem;
    color: var(--text-secondary);
    transition: all var(--transition);
    text-align: left;
    font-weight: 500;
    margin: 2px 0;
    font-family: var(--font);
    position: relative;
}

.sidebar .cat-btn:hover {
    background: var(--accent-soft);
    color: var(--accent);
    transform: translateX(3px);
}

.sidebar .cat-btn.active {
    background: linear-gradient(135deg, var(--accent-soft), rgba(99,102,241,0.08));
    color: var(--accent);
    font-weight: 700;
    box-shadow: inset 3px 0 0 var(--accent);
}

.sidebar .cat-btn .cat-icon {
    font-size: 1.05rem;
    width: 24px;
    text-align: center;
}

.sidebar .cat-btn .cat-count {
    margin-left: auto;
    font-size: 0.65rem;
    color: var(--text-muted);
    background: var(--bg);
    padding: 1px 8px;
    border-radius: 10px;
    font-weight: 600;
}

.sidebar-footer {
    padding: 12px 14px;
    border-top: 1px solid var(--border);
    font-size: 0.7rem;
    color: var(--text-muted);
    text-align: center;
    line-height: 1.6;
}

/* ===== Main Content ===== */
.main {
    margin-left: var(--sidebar-w);
    flex: 1;
    padding: 24px 32px;
    max-width: 1200px;
    width: 100%;
    transition: margin-left var(--transition-slow);
}

/* ===== Hero Section ===== */
.hero {
    background: linear-gradient(135deg, #6366f1 0%, #7c3aed 40%, #a855f7 70%, #d946ef 100%);
    background-size: 200% 200%;
    animation: heroShift 8s ease infinite;
    border-radius: var(--radius-xl);
    padding: 48px 52px;
    margin-bottom: 32px;
    color: #fff;
    position: relative;
    overflow: hidden;
    box-shadow: 0 12px 40px rgba(99,102,241,0.25);
}

@keyframes heroShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero::before {
    content: '';
    position: absolute;
    top: -60%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: rgba(255,255,255,0.07);
    border-radius: 50%;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -40%;
    left: 10%;
    width: 400px;
    height: 400px;
    background: rgba(255,255,255,0.04);
    border-radius: 50%;
    pointer-events: none;
}

.hero-content { position: relative; z-index: 1; }

.hero h1 {
    font-size: 2.4rem;
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -0.03em;
    line-height: 1.15;
}

.hero p {
    font-size: 1.05rem;
    opacity: 0.9;
    margin-bottom: 28px;
    max-width: 580px;
    line-height: 1.6;
    font-weight: 400;
}

.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
}

.hero-currency {
    padding: 12px 20px;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.1);
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    font-size: 0.85rem;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: all var(--transition);
    font-family: var(--font);
}

.hero-currency:hover {
    background: rgba(255,255,255,0.18);
    border-color: rgba(255,255,255,0.35);
}

.hero-currency option { color: var(--text-primary); background: var(--bg-card); }

/* ===== Search ===== */
.search-wrap {
    position: relative;
    margin-bottom: 28px;
}

.search-bar {
    width: 100%;
    padding: 18px 24px 18px 56px;
    border: 2px solid var(--border);
    border-radius: 16px;
    font-size: 0.95rem;
    background: var(--bg-card);
    color: var(--text-primary);
    transition: all var(--transition);
    box-shadow: var(--shadow);
    font-family: var(--font);
}

.search-bar:focus {
    border-color: var(--accent);
    outline: none;
    box-shadow: 0 0 0 4px rgba(99,102,241,0.1), var(--shadow);
}

.search-wrap::before {
    content: '🔍';
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.2rem;
    pointer-events: none;
    opacity: 0.6;
}

.search-clear {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text-muted);
    padding: 4px 8px;
    border-radius: 4px;
    display: none;
    transition: all var(--transition);
}

.search-clear:hover { color: var(--text-primary); background: var(--bg); }
.search-bar:not(:placeholder-shown) ~ .search-clear { display: block; }

/* ===== Category Title ===== */
.category-title {
    font-size: 1.25rem;
    font-weight: 800;
    margin: 36px 0 18px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.category-title::after {
    content: '';
    flex: 1;
    height: 3px;
    background: var(--accent-gradient);
    border-radius: 3px;
    margin-left: 10px;
    opacity: 0.3;
}

/* ===== Tools Grid ===== */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 20px;
}

/* ===== Tool Card ===== */
.tool-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 24px 26px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: all var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient);
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.tool-card:hover {
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-color: transparent;
    transform: translateY(-4px);
}

.tool-card:hover::before { opacity: 1; }

.tool-card-header {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 14px;
}

.tool-card-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--accent-soft), rgba(99,102,241,0.06));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
    transition: transform var(--transition);
}

.tool-card:hover .tool-card-icon { transform: scale(1.05) rotate(-2deg); }

.tool-card-title-wrap {
    flex: 1;
    min-width: 0;
}

.tool-card h3 {
    font-size: 0.92rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 6px;
    word-break: break-word;
}

.tool-card .tool-open-link {
    margin-left: auto;
    font-size: 0.85rem;
    text-decoration: none;
    color: var(--text-muted);
    opacity: 0;
    transition: all var(--transition);
    padding: 2px 6px;
    border-radius: 4px;
    flex-shrink: 0;
}

.tool-card:hover .tool-open-link { opacity: 1; color: var(--accent); }
.tool-open-link:hover { background: var(--accent-soft); }

.tool-card .inputs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 14px;
}

.inp-wrap, .tool-card .inputs > div {
    flex: 1 1 140px;
    min-width: 100px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.tool-card input,
.tool-card select,
.tool-card textarea {
    width: 100%;
    display: block;
    padding: 10px 14px;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    font-size: 0.85rem;
    background: var(--bg);
    color: var(--text-primary);
    font-family: var(--font);
    transition: border-color var(--transition), box-shadow var(--transition);
    box-sizing: border-box;
}

.tool-card input:hover,
.tool-card select:hover,
.tool-card textarea:hover {
    border-color: var(--text-muted);
}

.tool-card input:focus,
.tool-card select:focus,
.tool-card textarea:focus {
    border-color: var(--accent);
    outline: none;
    box-shadow: 0 0 0 3px rgba(99,102,241,0.1);
}

.tool-card textarea {
    width: 100%;
    min-height: 60px;
    resize: vertical;
}

.tool-card-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tool-card button {
    padding: 11px 24px;
    background: var(--accent-gradient);
    color: #fff;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
    font-family: var(--font);
}

.tool-card button::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.1);
    opacity: 0;
    transition: opacity var(--transition);
}

.tool-card button:hover::after { opacity: 1; }

.tool-card button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99,102,241,0.35);
}

.tool-card button:active { transform: translateY(0) scale(0.98); }
.tool-card button:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }

.tool-card-open {
    font-size: 0.78rem;
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    opacity: 0.5;
    transition: all var(--transition);
    padding: 11px 14px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    border-radius: 8px;
}

.tool-card-open:hover { opacity: 1; background: var(--accent-soft); }

/* ===== Result ===== */
.tool-card .result {
    margin-top: 14px;
    padding: 16px 20px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.9rem;
    min-height: 24px;
    word-break: break-word;
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    color: #166534;
    border: 1px solid #bbf7d0;
    animation: slideUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    box-shadow: 0 2px 8px rgba(34,197,94,0.1);
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(10px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.result-copy {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.85);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 5px 10px;
    font-size: 0.7rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition);
    opacity: 0;
    font-family: var(--font);
    font-weight: 500;
}

.result:hover .result-copy { opacity: 1; }
.result-copy:hover { background: #fff; color: var(--accent); border-color: var(--accent); }

.tool-card .result.error {
    background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
    color: #991b1b;
    border-color: #fecaca;
    box-shadow: 0 2px 8px rgba(239,68,68,0.1);
}

.tool-card .result.info {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    color: #1e40af;
    border-color: #bfdbfe;
    box-shadow: 0 2px 8px rgba(59,130,246,0.1);
}

label.small {
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ===== Hamburger ===== */
.hamburger {
    display: none;
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 400;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    font-size: 1.4rem;
    cursor: pointer;
    padding: 10px 14px;
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
    transition: all var(--transition);
    line-height: 1;
}

body.admin-bar .hamburger { top: 44px; }
.hamburger:hover { border-color: var(--accent); background: var(--accent-soft); }

/* ===== Footer ===== */
footer.site-footer {
    background: linear-gradient(180deg, var(--bg-card), var(--accent-soft));
    border-top: 1px solid var(--border);
    padding: 36px 32px 32px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-left: var(--sidebar-w);
    transition: margin-left var(--transition-slow);
}

.footer-stats {
    display: flex;
    gap: 48px;
    justify-content: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.footer-stat { text-align: center; }

.footer-stat-num {
    font-size: 1.8rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.footer-stat-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.footer-links { display: flex; gap: 24px; justify-content: center; flex-wrap: wrap; margin-bottom: 12px; }
footer.site-footer a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition);
}

footer.site-footer a:hover { color: var(--accent-hover); text-decoration: underline; }

/* ===== Single Tool Page ===== */
.tool-page-wrap { max-width: 760px; margin: 0 auto; width: 100%; }

.tool-page-back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 20px;
    transition: all var(--transition);
    text-decoration: none;
    font-family: var(--font);
}

.tool-page-back:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: var(--shadow-sm), var(--shadow-glow);
    transform: translateX(-2px);
}

.tool-page-card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: 40px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.tool-page-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent-gradient);
}

.tool-page-card h1 {
    font-size: 1.9rem;
    font-weight: 800;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
    letter-spacing: -0.02em;
}

.tool-page-card .tool-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
    line-height: 1.6;
}

.tool-page-card .inputs {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 24px;
}

.tool-page-card .inputs > div {
    flex: 1 1 200px;
    min-width: 140px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.tool-page-card input,
.tool-page-card select,
.tool-page-card textarea {
    width: 100%;
    display: block;
    padding: 14px 18px;
    border: 1.5px solid var(--border);
    border-radius: 12px;
    font-size: 0.95rem;
    background: var(--bg);
    color: var(--text-primary);
    font-family: var(--font);
    transition: border-color var(--transition), box-shadow var(--transition);
    box-sizing: border-box;
}

.tool-page-card input:focus,
.tool-page-card select:focus,
.tool-page-card textarea:focus {
    border-color: var(--accent);
    outline: none;
    box-shadow: 0 0 0 4px rgba(99,102,241,0.1);
}

.tool-page-card textarea { min-height: 100px; resize: vertical; }

.tool-page-card .calc-btn-wrap {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.tool-page-card button.calc-btn {
    padding: 16px 36px;
    background: var(--accent-gradient);
    color: #fff;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 700;
    font-size: 1rem;
    transition: all var(--transition);
    font-family: var(--font);
    letter-spacing: 0.01em;
    position: relative;
    overflow: hidden;
}

.tool-page-card button.calc-btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.1);
    opacity: 0;
    transition: opacity var(--transition);
}

.tool-page-card button.calc-btn:hover::after { opacity: 1; }

.tool-page-card button.calc-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(99,102,241,0.35);
}

.tool-page-card button.calc-btn:active { transform: translateY(0) scale(0.98); }

.tool-page-card .result {
    margin-top: 24px;
    padding: 20px 24px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1.05rem;
    min-height: 30px;
    word-break: break-word;
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    color: #166534;
    border: 1px solid #bbf7d0;
    animation: slideUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    box-shadow: 0 2px 8px rgba(34,197,94,0.1);
}

.tool-page-card .result.error {
    background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
    color: #991b1b;
    border-color: #fecaca;
    box-shadow: 0 2px 8px rgba(239,68,68,0.1);
}

.tool-page-card .result.info {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    color: #1e40af;
    border-color: #bfdbfe;
    box-shadow: 0 2px 8px rgba(59,130,246,0.1);
}

.related-tools { margin-top: 32px; }
.related-tools h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 14px; color: var(--text-primary); }

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
}

.related-grid a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 11px 16px;
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all var(--transition);
}

.related-grid a:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state-icon { font-size: 3rem; margin-bottom: 12px; }
.empty-state h3 { font-size: 1.2rem; color: var(--text-secondary); margin-bottom: 6px; }
.empty-state p { font-size: 0.9rem; }

/* ===== Print Styles ===== */
@media print {
    .sidebar, .hamburger, .search-wrap, .hero, .tool-card-open, .tool-open-link,
    .site-footer .footer-stats, .result-copy, .related-tools { display: none !important; }
    .main { margin-left: 0 !important; padding: 0 !important; }
    .tool-card { break-inside: avoid; box-shadow: none; border: 1px solid #ddd; }
    body { background: #fff; color: #000; }
}

/* ===== Responsive ===== */
@media (max-width: 1200px) {
    .tools-grid { grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); }
}

@media (max-width: 1024px) {
    .tools-grid { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
    .hero { padding: 32px 28px; }
    .hero h1 { font-size: 1.7rem; }
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: 290px;
        height: 100vh;
        z-index: 300;
        transform: translateX(-100%);
        box-shadow: var(--shadow-xl);
    }

    body.admin-bar .sidebar { top: 0; height: 100vh; }

    .sidebar.open { transform: translateX(0); }

    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.35);
        z-index: 299;
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--transition-slow);
        backdrop-filter: blur(6px);
        -webkit-backdrop-filter: blur(6px);
    }

    .sidebar.open ~ .sidebar-overlay { opacity: 1; pointer-events: auto; }

    .sidebar {
        background: var(--glass-bg);
        backdrop-filter: blur(20px) saturate(1.4);
        border-right: none;
    }

    .hamburger { display: block; }

    .main {
        margin-left: 0;
        padding: 16px;
        padding-top: 60px;
    }

    .hero {
        padding: 28px 24px;
        border-radius: var(--radius);
    }

    .hero h1 { font-size: 1.4rem; }
    .hero p { font-size: 0.9rem; }

    .tools-grid { grid-template-columns: 1fr; }

    .tool-card { padding: 18px; }
    .tool-card .result { font-size: 0.85rem; padding: 12px; }

    footer.site-footer {
        margin-left: 0;
        padding: 20px 16px;
    }

    .footer-stats { gap: 24px; }
    .footer-stat-num { font-size: 1.3rem; }

    .tool-page-card { padding: 24px; }
    .tool-page-card h1 { font-size: 1.4rem; }
    .tool-page-card .inputs > div { flex: 1 1 100%; }

    .related-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
}

@media (max-width: 480px) {
    .main { padding: 12px; padding-top: 56px; }

    .hero {
        padding: 22px 18px;
        border-radius: var(--radius-sm);
    }

    .hero h1 { font-size: 1.2rem; }
    .hero p { font-size: 0.85rem; margin-bottom: 16px; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .hero-currency { width: 100%; }

    .tool-card { padding: 14px; border-radius: var(--radius-sm); }
    .tool-card input,
    .tool-card select,
    .tool-card textarea { flex: 1 1 100%; font-size: 16px; }
    .tool-card button { width: 100%; justify-content: center; }
    .tool-card-actions { flex-direction: column; }

    .search-bar { font-size: 16px; padding: 14px 16px 14px 44px; }

    .tool-page-card { padding: 16px; }
    .tool-page-card h1 { font-size: 1.2rem; }
    .tool-page-card button.calc-btn { width: 100%; }

    footer.site-footer { padding: 16px 12px; }
    .footer-stats { gap: 16px; }
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 3px; border: 1px solid transparent; background-clip: content-box; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* ===== Accessibility ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

.sr-only {
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ===== Focus Visible ===== */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
:focus:not(:focus-visible) { outline: none; }

/* ===== Dark Mode Overrides (manual toggle) ===== */
html.dark-mode {
    color-scheme: dark;
    --bg: #0b0e17;
    --bg-card: #131822;
    --text-primary: #eef2f6;
    --text-secondary: #8899b4;
    --text-muted: #5a6a85;
    --accent-soft: #191e3a;
    --border: #1e2538;
    --glass-bg: rgba(19,24,34,0.85);
    --glass-border: rgba(255,255,255,0.06);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
    --shadow: 0 3px 6px rgba(0,0,0,0.3);
    --shadow-md: 0 8px 16px rgba(0,0,0,0.35);
    --shadow-lg: 0 16px 32px rgba(0,0,0,0.4);
    --shadow-xl: 0 28px 56px rgba(0,0,0,0.5);
    --accent-glow: rgba(99,102,241,0.15);
}

/* ===== Dark Mode Toggle Button ===== */
.dark-toggle-btn {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.1rem;
    padding: 6px 10px;
    color: var(--text-secondary);
    transition: all var(--transition);
    margin-left: auto;
    line-height: 1;
    font-family: var(--font);
    position: relative;
}

.dark-toggle-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-soft);
    transform: rotate(-8deg);
}

/* ===== Toast Container ===== */
.toast-container {
    position: fixed;
    bottom: 28px;
    right: 28px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.toast {
    padding: 14px 22px;
    border-radius: 14px;
    font-size: 0.85rem;
    font-weight: 500;
    color: #fff;
    box-shadow: 0 8px 32px rgba(0,0,0,0.15);
    transform: translateY(24px) scale(0.95);
    opacity: 0;
    transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    pointer-events: auto;
    max-width: 360px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.toast-show { transform: translateY(0) scale(1); opacity: 1; }

.toast-info { background: linear-gradient(135deg, #6366f1, #7c3aed); }
.toast-error { background: linear-gradient(135deg, #ef4444, #dc2626); }
.toast-success { background: linear-gradient(135deg, #22c55e, #16a34a); }

/* ===== Search Dropdown ===== */
.search-wrap { position: relative; }

.search-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-xl);
    z-index: 500;
    max-height: 360px;
    overflow-y: auto;
    display: none;
    margin-top: 2px;
}

.search-dropdown.open { display: block; animation: slideUp 0.15s ease; }

.search-dd-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all var(--transition);
    border-bottom: 1px solid var(--border);
}

.search-dd-item:last-child { border-bottom: none; }

.search-dd-item:hover {
    background: var(--accent-soft);
    color: var(--accent);
}

.sdi-icon { font-size: 1rem; }
.sdi-name { flex: 1; }

/* ===== Favorite Button ===== */
.fav-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    padding: 0 4px;
    color: var(--text-muted);
    transition: all var(--transition);
    line-height: 1;
}

.fav-btn:hover { transform: scale(1.25); color: #f59e0b; }

.tool-card h3 { display: flex; align-items: center; gap: 4px; }
.tool-card h3 a.tool-open-link { margin-left: 0; }

/* ===== Recently Used Sidebar ===== */
.sidebar-recent {
    padding: 10px 10px 6px;
    border-bottom: 1px solid var(--border);
}

.sidebar-recent-header {
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 4px 4px 8px;
}

.sidebar-recent-item {
    display: block;
    padding: 7px 10px;
    font-size: 0.78rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    transition: all var(--transition);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-recent-item:hover {
    background: var(--accent-soft);
    color: var(--accent);
    transform: translateX(2px);
}

/* ===== Scroll to Top Button ===== */
.scroll-top-btn {
    position: fixed;
    bottom: 28px;
    left: 28px;
    z-index: 999;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--accent-gradient);
    color: #fff;
    border: none;
    font-size: 1.3rem;
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(99,102,241,0.3);
    opacity: 0;
    transform: translateY(20px) scale(0.9);
    pointer-events: none;
    transition: all var(--transition-slow);
    display: flex;
    align-items: center;
    justify-content: center;
}

.scroll-top-btn.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.scroll-top-btn:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 8px 28px rgba(99,102,241,0.45);
}

.scroll-top-btn:active {
    transform: translateY(0) scale(0.95);
}

/* ===== Keyboard Shortcut Modal ===== */
.shortcut-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.45);
    z-index: 5000;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.shortcut-modal-wrap {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(1.4);
    -webkit-backdrop-filter: blur(20px) saturate(1.4);
    border-radius: var(--radius-xl);
    padding: 36px 40px;
    max-width: 420px;
    width: 90%;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--glass-border);
}

.shortcut-modal-wrap h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.shortcut-modal-wrap table { width: 100%; border-collapse: collapse; }

.shortcut-modal-wrap td {
    padding: 10px 4px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
}

.shortcut-modal-wrap tr:last-child td { border-bottom: none; }

.shortcut-modal-wrap td:first-child { width: 120px; }

kbd {
    display: inline-block;
    padding: 4px 10px;
    font-size: 0.72rem;
    font-family: var(--font);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    box-shadow: 0 1.5px 0 var(--border);
    color: var(--text-primary);
    font-weight: 600;
}

.shortcut-close {
    margin-top: 24px;
    padding: 12px 28px;
    border: none;
    border-radius: 12px;
    background: var(--accent-gradient);
    color: #fff;
    font-weight: 700;
    cursor: pointer;
    font-family: var(--font);
    transition: all var(--transition);
    width: 100%;
    font-size: 0.9rem;
}

.shortcut-close:hover {
    box-shadow: 0 6px 20px rgba(99,102,241,0.35);
    transform: translateY(-1px);
}

/* ===== Tool Breadcrumbs ===== */
.tool-breadcrumbs {
    margin-bottom: 16px;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.tool-breadcrumbs a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition);
}

.tool-breadcrumbs a:hover { color: var(--accent-hover); text-decoration: underline; }

.bc-sep {
    margin: 0 6px;
    color: var(--text-muted);
}

.tool-breadcrumbs span:last-child {
    color: var(--text-secondary);
    font-weight: 600;
}

/* ===== Loading Skeleton CSS ===== */
@keyframes shimmer {
    0% { background-position: -400px 0; }
    100% { background-position: 400px 0; }
}

.skeleton-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 20px;
}

.skeleton-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 24px 26px;
    border: 1px solid var(--border);
}

.skeleton-line {
    height: 14px;
    border-radius: 10px;
    background: linear-gradient(90deg, var(--border) 25%, var(--accent-soft) 50%, var(--border) 75%);
    background-size: 400px 100%;
    animation: shimmer 1.5s ease-in-out infinite;
    margin-bottom: 12px;
}

.skeleton-line:first-child { width: 55%; height: 20px; }
.skeleton-line:nth-child(2) { width: 85%; }
.skeleton-line:nth-child(3) { width: 40%; }
.skeleton-line:last-child { width: 35%; height: 36px; margin-top: 16px; margin-bottom: 0; border-radius: 10px; }

/* Remove skeleton once tools load */
.tools-grid + .skeleton-grid { display: none; }

/* ===== Enhanced Tool Card Animations ===== */
.tool-card {
    animation: cardIn 0.3s ease both;
}

@keyframes cardIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.tool-card:nth-child(1) { animation-delay: 0.02s; }
.tool-card:nth-child(2) { animation-delay: 0.04s; }
.tool-card:nth-child(3) { animation-delay: 0.06s; }
.tool-card:nth-child(4) { animation-delay: 0.08s; }
.tool-card:nth-child(5) { animation-delay: 0.10s; }
.tool-card:nth-child(6) { animation-delay: 0.12s; }

/* ===== Responsive additions ===== */
@media (max-width: 768px) {
    .toast-container { bottom: 16px; right: 16px; left: 16px; }
    .toast { max-width: 100%; font-size: 0.82rem; }
    .scroll-top-btn { bottom: 16px; left: 16px; width: 38px; height: 38px; font-size: 1.1rem; }
    .shortcut-modal-wrap { padding: 24px; }
    .skeleton-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .toast { padding: 10px 16px; }
    .search-dropdown { max-height: 280px; }
    .sidebar-recent-item { font-size: 0.75rem; }
}

/* ===== Skeleton loading state ===== */
#toolsContainer .empty-state:only-child .skeleton-grid { display: none; }

/* ===== Home link in sidebar ===== */
.home-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.82rem;
    font-weight: 500;
    border-radius: 10px;
    transition: all var(--transition);
    margin: 2px 6px 6px;
}

.home-link:hover {
    background: var(--accent-soft);
    color: var(--accent);
    transform: translateX(2px);
}

/* ===== Input validation ===== */
input.error-input, select.error-input {
    border-color: #ef4444 !important;
    box-shadow: 0 0 0 3px rgba(239,68,68,0.1) !important;
}

input.success-input, select.success-input {
    border-color: #22c55e !important;
    box-shadow: 0 0 0 3px rgba(34,197,94,0.1) !important;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .tool-card { animation: none; }
    .skeleton-line { animation: none; background: var(--border); }
    .scroll-top-btn { transition: none; }
    .toast { transition: none; }
}