/* CSS Variables for Light/Dark Mode */
:root[data-bs-theme="dark"] {
    --bg-main: #0a0a0f;
    --bg-card: #1a1a2a;
    --bg-header: rgba(255,255,255,0.03);
    --bg-input: #12121e;
    --bg-input-focus: #1a1a2e;
    --border-color: rgba(255,255,255,0.08);
    --border-input: rgba(255,255,255,0.1);
    --text-main: #e0e0e0;
    --text-muted: #9ca3af;
    --text-card-header: #adb5bd;
    --shadow-main: 0 4px 20px rgba(0,0,0,0.4);
    --bg-gradient: radial-gradient(ellipse at 10% 20%, rgba(13,110,253,0.05) 0%, transparent 50%),
                   radial-gradient(ellipse at 90% 80%, rgba(102,16,242,0.04) 0%, transparent 50%);
    --nav-bg: rgba(15,15,25,0.95);
    --btn-primary-text: #fff;
}

:root[data-bs-theme="light"] {
    --bg-main: #f5f7fa;
    --bg-card: #ffffff;
    --bg-header: #f8f9fa;
    --bg-input: #ffffff;
    --bg-input-focus: #ffffff;
    --border-color: #e2e8f0;
    --border-input: #cbd5e1;
    --text-main: #2d3748;
    --text-muted: #718096;
    --text-card-header: #4a5568;
    --shadow-main: 0 4px 20px rgba(0,0,0,0.05);
    --bg-gradient: radial-gradient(ellipse at 10% 20%, rgba(13,110,253,0.03) 0%, transparent 50%),
                   radial-gradient(ellipse at 90% 80%, rgba(102,16,242,0.02) 0%, transparent 50%);
    --nav-bg: rgba(255,255,255,0.95);
    --btn-primary-text: #fff;
}

* { box-sizing: border-box; }

body {
    background-color: var(--bg-main);
    background-image: var(--bg-gradient);
    color: var(--text-main);
    font-family: 'Inter', 'Segoe UI', sans-serif;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Card Styling */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--shadow-main);
    margin-bottom: 20px;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.card-header {
    background-color: var(--bg-header);
    border-bottom: 1px solid var(--border-color);
    border-radius: 16px 16px 0 0 !important;
    font-weight: 600;
    padding: 14px 20px;
    font-size: 14px;
    color: var(--text-card-header);
}

.card-body { padding: 20px; }

/* Forms */
.form-label {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 5px;
}

.form-control, .form-select, .input-group-text {
    background-color: var(--bg-input);
    border: 1px solid var(--border-input);
    color: var(--text-main);
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.2s;
}

.form-control:focus, .form-select:focus {
    background-color: var(--bg-input-focus);
    border-color: #0d6efd;
    color: var(--text-main);
    box-shadow: 0 0 0 3px rgba(13,110,253,0.2);
}

.form-control::placeholder {
    color: var(--text-muted);
    opacity: 0.7;
}

.input-group-text {
    color: var(--text-muted);
}

/* Navbar */
.navbar {
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-main);
}

.navbar-brand {
    font-weight: 700;
    letter-spacing: 2px;
}
:root[data-bs-theme="dark"] .navbar-brand {
    background: linear-gradient(135deg, #fff, #adb5bd);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
:root[data-bs-theme="light"] .navbar-brand {
    background: linear-gradient(135deg, #2d3748, #4a5568);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-badge {
    background: linear-gradient(135deg, #0d6efd, #6610f2);
    border-radius: 6px; padding: 2px 8px;
    font-size: 11px; font-weight: 600; color: #fff; margin-left: 8px;
}

/* Auth Pages Specific */
.auth-wrapper {
    width: 100%; max-width: 440px; padding: 20px; margin: auto;
}
.brand-icon {
    width: 64px; height: 64px; background: linear-gradient(135deg, #0d6efd, #6610f2);
    border-radius: 18px; display: flex; align-items: center; justify-content: center;
    margin: 0 auto 16px; font-size: 28px; box-shadow: 0 8px 32px rgba(13,110,253,0.4);
}

/* Buttons */
.btn-primary, .btn-login {
    background: linear-gradient(135deg, #0d6efd, #6610f2);
    border: none; padding: 10px 24px; border-radius: 10px; font-weight: 600;
    color: var(--btn-primary-text) !important;
}
.btn-primary:hover, .btn-login:hover {
    transform: translateY(-1px); box-shadow: 0 6px 20px rgba(13,110,253,0.4);
    color: var(--btn-primary-text) !important;
}

/* Modals */
.modal-content {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
}
.modal-header {
    background-color: var(--bg-header);
    border-bottom: 1px solid var(--border-color);
    border-radius: 16px 16px 0 0;
}

/* Theme Toggle Button */
.theme-toggle-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 8px;
    padding: 6px 12px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
}
.theme-toggle-btn:hover {
    background: var(--bg-header);
}

/* Utility / Alerts */
.alert { border-radius: 10px; border: none; font-size: 13px; }
.alert-success { background: rgba(25,135,84,0.15); color: #a3cfbb; }
:root[data-bs-theme="light"] .alert-success { color: #198754; background: #d1e7dd; }
.alert-danger  { background: rgba(220,53,69,0.15); color: #f1aeb5; }
:root[data-bs-theme="light"] .alert-danger { color: #dc3545; background: #f8d7da; }
.alert-warning { background: rgba(255,193,7,0.12); color: #ffe08a; }
:root[data-bs-theme="light"] .alert-warning { color: #ffc107; background: #fff3cd; }

.section-icon { color: #0d6efd; margin-right: 8px; }