/* ===== CSS Variables & Theme ===== */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #1a1a2e;
    --bg-card-hover: #222240;
    --bg-input: #16162a;
    --border-color: rgba(255,255,255,0.08);
    --border-hover: rgba(255,255,255,0.15);
    --text-primary: #f0f0f5;
    --text-secondary: #8888a0;
    --text-muted: #55556a;
    --accent: #e91e63;
    --accent-hover: #f4336e;
    --accent-glow: rgba(233,30,99,0.3);
    --accent2: #ff6b35;
    --accent3: #7c4dff;
    --success: #4caf50;
    --warning: #ff9800;
    --danger: #f44336;
    --glass: rgba(255,255,255,0.04);
    --glass-border: rgba(255,255,255,0.06);
    --shadow: 0 4px 24px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --sidebar-width: 260px;
    --topbar-height: 64px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Cormorant Garamond', Georgia, serif;
}

[data-theme="light"] {
    --bg-primary: #f5f5f7;
    --bg-secondary: #eeeef2;
    --bg-card: #ffffff;
    --bg-card-hover: #f8f8fc;
    --bg-input: #f0f0f5;
    --border-color: rgba(0,0,0,0.08);
    --border-hover: rgba(0,0,0,0.15);
    --text-primary: #1a1a2e;
    --text-secondary: #666680;
    --text-muted: #9999aa;
    --glass: rgba(255,255,255,0.7);
    --glass-border: rgba(0,0,0,0.06);
    --shadow: 0 4px 24px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 14px; scroll-behavior: smooth; }

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background var(--transition), color var(--transition);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; color: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; color: inherit; }

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

/* ===== Layout ===== */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    transition: margin-left var(--transition);
}

.page-container {
    padding: 24px 32px;
    width: 100%;
    max-width: none;
}

/* ===== Topbar ===== */
.topbar {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
    position: sticky;
    top: 0;
    z-index: 90;
    backdrop-filter: blur(12px);
}

.topbar-left { display: flex; align-items: center; gap: 16px; }
.topbar-right { display: flex; align-items: center; gap: 16px; }

.topbar-help {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 14px;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    background: linear-gradient(135deg, rgba(233,30,99,0.12), rgba(124,77,255,0.1));
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 600;
    transition: all var(--transition);
}

.topbar-help svg {
    color: var(--accent);
    flex-shrink: 0;
}

.topbar-help:hover {
    border-color: var(--border-hover);
    background: linear-gradient(135deg, rgba(233,30,99,0.2), rgba(124,77,255,0.16));
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
    transform: translateY(-1px);
}

.menu-toggle {
    display: none;
    padding: 8px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    transition: all var(--transition);
}
.menu-toggle:hover { background: var(--glass); color: var(--text-primary); }

.breadcrumb {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
}

.search-box {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 6px 16px;
    transition: all var(--transition);
}
.search-box:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.search-box svg { color: var(--text-muted); flex-shrink: 0; }
.search-box input {
    background: none;
    border: none;
    outline: none;
    width: 180px;
    font-size: 13px;
    color: var(--text-primary);
}
.search-box input::placeholder { color: var(--text-muted); }

.topbar-icon-btn {
    position: relative;
    padding: 8px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    transition: all var(--transition);
}
.topbar-icon-btn:hover { background: var(--glass); color: var(--text-primary); }
.notification-dot {
    position: absolute;
    top: 6px; right: 6px;
    width: 8px; height: 8px;
    background: var(--accent);
    border-radius: 50%;
}

.topbar-user {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 12px 4px 4px;
    border-radius: 20px;
    cursor: pointer;
    transition: all var(--transition);
}
.topbar-user:hover { background: var(--glass); }
.user-avatar-sm {
    width: 32px; height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent3));
    display: flex; align-items: center; justify-content: center;
    font-size: 13px; font-weight: 600; color: #fff;
}
.user-name { font-size: 13px; color: var(--text-secondary); }

.topbar-credits {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 14px;
    border-radius: 16px;
    background: var(--glass);
    font-size: 13px;
    color: var(--text-secondary);
    cursor: default;
    user-select: none;
    transition: all var(--transition);
}
.topbar-credits svg {
    color: var(--accent);
    flex-shrink: 0;
}
.topbar-credits-num {
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .topbar-help span {
        display: none;
    }

    .topbar-help {
        padding: 8px;
        width: 36px;
        height: 36px;
        justify-content: center;
    }
}

/* ===== Login Overlay ===== */
.login-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(6, 6, 10, 0.82);
    backdrop-filter: blur(10px);
    z-index: 1200;
}

.login-card {
    width: 360px;
    max-width: 92vw;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px 26px;
    box-shadow: var(--shadow-lg);
}

.login-brand {
    font-family: var(--font-serif);
    font-size: 22px;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.login-sub {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 18px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.login-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 6px;
}

.login-input {
    width: 100%;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: var(--bg-input);
    color: var(--text-primary);
    outline: none;
    transition: all var(--transition);
}

.login-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.login-error {
    min-height: 16px;
    font-size: 12px;
    color: var(--danger);
}

.login-btn {
    margin-top: 8px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--accent), var(--accent3));
    color: #fff;
    font-weight: 600;
    transition: transform var(--transition), box-shadow var(--transition);
}

.login-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.35);
}

.login-hint {
    margin-top: 14px;
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
}