/* --- CSS Variables & Theming --- */
:root {
    --primary-color: #4a00e0;
    --primary-hover: #3b00b3;
    --secondary-color: #8e2de2;
    --bg-color: #f4f6f9;
    --text-color: #333333;
    --card-bg: #ffffff;
    --border-color: #e0e0e0;
    --navbar-bg: #ffffff;
}

[data-theme="dark"] {
    --primary-color: #6a35ff;
    --primary-hover: #8e5cff;
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --card-bg: #1e1e1e;
    --border-color: #333333;
    --navbar-bg: #1e1e1e;
}

/* --- Base Layout --- */
body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    transition: background-color 0.3s ease, color 0.3s ease;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1;
}

/* --- Components --- */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    border-radius: 10px;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.navbar {
    background-color: var(--navbar-bg) !important;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 10px rgba(0,0,0,0.02);
}

.navbar-brand {
    font-weight: 700;
    color: var(--primary-color) !important;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.btn-primary {
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    border: none;
    color: #fff !important;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(74, 0, 224, 0.3);
}

/* --- Landing Page Specific --- */
.hero-section {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--bg-color) 0%, rgba(74, 0, 224, 0.05) 100%);
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.8;
    margin-bottom: 40px;
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

/* --- Utilities --- */
.text-primary-custom {
    color: var(--primary-color) !important;
}

/* Toast Positioning */
.toast-container {
    z-index: 1056;
}

/* Spinner Loader */
.btn-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}
.btn-loading::after {
    content: '';
    position: absolute;
    width: 1.2rem;
    height: 1.2rem;
    top: 50%;
    left: 50%;
    margin-top: -0.6rem;
    margin-left: -0.6rem;
    border: 2px solid rgba(255,255,255,0.5);
    border-top-color: #fff;
    border-radius: 50%;
    animation: button-spin 0.6s linear infinite;
}
@keyframes button-spin {
    to { transform: rotate(360deg); }
}