/**
 * AmzUpload - Style System
 * Apple-inspired modern design
 */

/* ===========================
   CSS Variables / Design Tokens
   =========================== */
:root {
    /* Colors */
    --bg-primary: #fafafa;
    --bg-secondary: #ffffff;
    --bg-glass: rgba(255, 255, 255, 0.72);
    --text-primary: #1d1d1f;
    --text-secondary: #86868b;
    --accent: #0071e3;
    --accent-hover: #0077ed;
    --success: #34c759;
    --error: #ff3b30;
    --warning: #ff9500;
    
    /* Borders & Shadows */
    --border: rgba(0, 0, 0, 0.08);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
    
    /* Spacing & Sizing */
    --radius: 16px;
    --radius-sm: 10px;
    --radius-pill: 980px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===========================
   Header
   =========================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-weight: 600;
    font-size: 20px;
    color: var(--text-primary);
    text-decoration: none;
}

.logo span {
    color: var(--accent);
}

/* ===========================
   Hero Section
   =========================== */
.hero {
    padding: 160px 24px 80px;
    text-align: center;
    background: linear-gradient(180deg, #ffffff 0%, var(--bg-primary) 100%);
}

.hero h1 {
    font-size: clamp(40px, 6vw, 64px);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--text-primary) 0%, #434343 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 20px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===========================
   Main Content
   =========================== */
.main-content {
    max-width: 560px;
    margin: 0 auto;
    padding: 0 24px 80px;
}

/* ===========================
   Card Component
   =========================== */
.card {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 40px;
    margin-bottom: 40px;
}

.card-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
}

.card-subtitle {
    color: var(--text-secondary);
    margin-bottom: 32px;
}

/* ===========================
   Form Components
   =========================== */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.form-input {
    width: 100%;
    padding: 14px 16px;
    font-size: 16px;
    font-family: inherit;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.12);
}

.form-input::placeholder {
    color: #c7c7cc;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* ===========================
   Button Components
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 500;
    font-family: inherit;
    border: none;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: all var(--transition-fast);
    width: 100%;
    margin-top: 12px;
}

.btn-primary {
    background: var(--accent);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: scale(1.01);
}

.btn-primary:active {
    transform: scale(0.99);
}

.btn-secondary {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: #f0f0f0;
}

/* ===========================
   Coming Soon Section
   =========================== */
.coming-soon {
    margin-top: 80px;
    padding-bottom: 80px;
}

.section-title {
    font-size: 32px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 40px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 24px;
}

.feature-card {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
    transition: transform var(--transition-fast);
}

.feature-card:hover {
    transform: translateY(-4px);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), #5856d6);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--accent), #5856d6);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 24px;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 14px;
}

.badge {
    display: inline-block;
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--warning), var(--error));
    color: white;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    border-radius: 100px;
    margin-bottom: 16px;
}

/* ===========================
   Modal Components
   =========================== */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    padding: 40px;
    max-width: 420px;
    width: 100%;
    text-align: center;
    box-shadow: var(--shadow-lg);
    animation: modalIn var(--transition-normal);
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 28px;
}

.modal-icon.confirm {
    background: rgba(0, 113, 227, 0.1);
}

.modal-icon.loading {
    background: rgba(0, 113, 227, 0.1);
}

.modal-icon.success {
    background: rgba(52, 199, 89, 0.1);
}

.modal-icon.error {
    background: rgba(255, 59, 48, 0.1);
}

.modal h2 {
    font-size: 22px;
    margin-bottom: 8px;
}

.modal p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.modal-buttons {
    display: flex;
    gap: 12px;
}

.modal-buttons .btn {
    flex: 1;
    margin: 0;
}

/* ===========================
   Spinner / Loading
   =========================== */
.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid rgba(0, 113, 227, 0.2);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ===========================
   Footer
   =========================== */
.footer {
    text-align: center;
    padding: 40px 24px;
    color: var(--text-secondary);
    font-size: 14px;
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 600px) {
    .form-row {
        grid-template-columns: 1fr;
    }

    .card {
        padding: 24px;
    }

    .modal {
        padding: 24px;
    }

    .hero {
        padding: 140px 16px 60px;
    }

    .hero p {
        font-size: 18px;
    }
}

/* ===========================
   Utility Classes
   =========================== */
.text-center { text-align: center; }
.text-secondary { color: var(--text-secondary); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.hidden { display: none; }