/**
 * AI Staff Photos - Main Stylesheet
 * EXPRE Branding: Purple gradient theme
 */

/* ===== CSS Variables ===== */
:root {
    /* EXPRE Brand Colors */
    --dark-navy: #0D0D2B;
    --primary-purple: #5A00D1;
    --accent-fuchsia: #C300FF;
    --cta-magenta: #B42CFF;
    --light-gray: #F8F9FA;
    --light-pink: #FFF2F4;
    --dark-gray: #2D2D2D;
    --black: #111111;
    --white: #FFFFFF;

    /* Gradients */
    --gradient: linear-gradient(135deg, var(--primary-purple), var(--accent-fuchsia));
    --gradient-vertical: linear-gradient(180deg, var(--primary-purple), var(--accent-fuchsia));
    --gradient-subtle: linear-gradient(135deg, rgba(90, 0, 209, 0.1), rgba(195, 0, 255, 0.1));

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 8px 25px rgba(0,0,0,0.1);
    --shadow-lg: 0 20px 40px rgba(0,0,0,0.12);
    --shadow-xl: 0 25px 50px rgba(0,0,0,0.15);
    --shadow-purple: 0 10px 30px rgba(90, 0, 209, 0.3);

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;

    /* Typography */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;

    /* Transitions */
    --transition-fast: all 0.15s ease;
    --transition-base: all 0.3s ease;
    --transition-slow: all 0.5s ease;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: var(--text-base);
    line-height: 1.7;
    color: var(--black);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* ===== Container ===== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-md);
    }
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(var(--text-4xl), 5vw, var(--text-6xl));
    font-weight: 800;
    margin-bottom: var(--space-lg);
}

h2 {
    font-size: clamp(var(--text-2xl), 3.5vw, var(--text-4xl));
    margin-bottom: var(--space-lg);
}

h3 {
    font-size: var(--text-2xl);
    font-weight: 600;
    margin-bottom: var(--space-md);
}

h4 {
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

p {
    margin-bottom: var(--space-md);
    color: #64748b;
    font-size: var(--text-lg);
    line-height: 1.7;
}

.lead {
    font-size: var(--text-xl);
    font-weight: 400;
    color: #64748b;
    line-height: 1.6;
}

/* Gradient Text */
.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== Links ===== */
a {
    color: var(--primary-purple);
    text-decoration: none;
    transition: var(--transition-base);
}

a:hover {
    color: var(--accent-fuchsia);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--text-sm);
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-base);
    border: none;
    position: relative;
    overflow: hidden;
    min-height: 36px;
}

.btn-primary {
    background: var(--gradient);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-purple);
    color: var(--white);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary-purple);
    border: 2px solid rgba(90, 0, 209, 0.2);
}

.btn-secondary:hover {
    background: var(--gradient-subtle);
    border-color: var(--primary-purple);
    color: var(--primary-purple);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.6);
    color: var(--white);
}

.btn-large {
    padding: 18px 40px;
    font-size: var(--text-lg);
}

.btn-small {
    padding: 4px 12px;
    font-size: var(--text-xs);
    min-height: 28px;
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: var(--space-md);
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--space-xs);
    color: var(--dark-gray);
    font-size: var(--text-sm);
}

.form-control {
    width: 100%;
    padding: 8px 12px;
    border: 2px solid #e1e5e9;
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    transition: var(--transition-base);
    background: #fafbfc;
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-purple);
    background: var(--white);
    box-shadow: 0 0 0 3px rgba(90, 0, 209, 0.1);
}

.form-control.error {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.05);
}

.form-control.success {
    border-color: #22c55e;
    background: rgba(34, 197, 94, 0.05);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

.form-hint {
    font-size: var(--text-sm);
    color: #64748b;
    margin-top: var(--space-xs);
}

.form-error {
    font-size: var(--text-sm);
    color: #ef4444;
    margin-top: var(--space-xs);
}

/* ===== Cards ===== */
.card {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(90, 0, 209, 0.1);
    overflow: hidden;
    transition: var(--transition-base);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    padding: var(--space-lg);
    border-bottom: 1px solid rgba(90, 0, 209, 0.1);
}

.card-body {
    padding: var(--space-lg);
}

.card-footer {
    padding: var(--space-lg);
    border-top: 1px solid rgba(90, 0, 209, 0.1);
    background: var(--light-gray);
}

/* ===== Alerts ===== */
.alert {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--text-sm);
}

.alert-success {
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.1), rgba(21, 128, 61, 0.1));
    color: #15803d;
    border: 1px solid rgba(34, 197, 94, 0.2);
}

.alert-error {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(185, 28, 28, 0.1));
    color: #b91c1c;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.alert-warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(180, 83, 9, 0.1));
    color: #b45309;
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.alert-info {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(29, 78, 216, 0.1));
    color: #1d4ed8;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

/* ===== Tables ===== */
.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: var(--space-sm) var(--space-md);
    text-align: left;
    border-bottom: 1px solid #e1e5e9;
}

.table th {
    font-weight: 600;
    color: var(--dark-gray);
    background: var(--light-gray);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table tr:hover td {
    background: rgba(90, 0, 209, 0.03);
}

/* ===== Badges ===== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-success {
    background: rgba(34, 197, 94, 0.15);
    color: #15803d;
}

.badge-warning {
    background: rgba(245, 158, 11, 0.15);
    color: #b45309;
}

.badge-error {
    background: rgba(239, 68, 68, 0.15);
    color: #b91c1c;
}

.badge-info {
    background: rgba(90, 0, 209, 0.15);
    color: var(--primary-purple);
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-sm); }
.gap-2 { gap: var(--space-md); }

.hidden { display: none !important; }

/* ===== Loading Spinner ===== */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--white);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .hide-mobile { display: none !important; }
}

@media (min-width: 769px) {
    .hide-desktop { display: none !important; }
}