/**
 * FileDrop.com Stylesheet
 * Branding: Purple & Grey with high readability
 */

/* ============================================
   CSS VARIABLES
   ============================================ */
:root {
    --color-primary: #705d97;
    --color-primary-dark: #5a4a7a;
    --color-primary-light: #8a75b0;
    --color-secondary: #718096;
    --color-secondary-light: #A0AEC0;
    --color-secondary-dark: #4A5568;
    --color-background: ghostwhite;
    --color-white: #FFFFFF;
    --color-text: #1f1d22;
    --color-text-light: #4A5568;
    --color-error: #E53E3E;
    --color-error-bg: #FED7D7;
    --color-success: #38A169;
    --color-success-bg: #C6F6D5;
    --color-warning: #D69E2E;
    --color-warning-bg: #FEFCBF;
    --color-border: #E2E8F0;
    --color-header-footer: #1f1d22;
    
    --font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --border-radius: 8px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --transition: all 0.2s ease;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-background);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--color-primary-dark);
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.main {
    flex: 1;
    padding: 40px 0;
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
    background: var(--color-header-footer);
    border-bottom: 1px solid #333;
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 64px;
    width: auto;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

.logo:hover {
    opacity: 0.9;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-email {
    color: #A0AEC0;
    font-size: 0.9rem;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-dark);
    color: var(--color-white);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
    background: var(--color-primary);
    color: var(--color-white);
}

/* Navbar button override for dark background */
.navbar .btn-outline {
    color: var(--color-white);
    border-color: var(--color-white);
}

.navbar .btn-outline:hover:not(:disabled) {
    background: var(--color-white);
    color: var(--color-header-footer);
}

.btn-danger {
    background: var(--color-error);
    color: var(--color-white);
}

.btn-danger:hover:not(:disabled) {
    background: #C53030;
    color: var(--color-white);
}

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

.btn-success:hover:not(:disabled) {
    background: #2F855A;
    color: var(--color-white);
}

.btn-block {
    width: 100%;
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.875rem;
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: var(--color-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    padding: 30px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-white);
    color: var(--color-text);
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(107, 70, 193, 0.1);
}

.form-group input::placeholder {
    color: var(--color-secondary-light);
}

/* ============================================
   ALERTS
   ============================================ */
.alert {
    padding: 15px 20px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    font-weight: 500;
}

.alert-error {
    background: var(--color-error-bg);
    color: var(--color-error);
}

.alert-success {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.alert-warning {
    background: var(--color-warning-bg);
    color: var(--color-warning);
}

/* File error alert styling */
.file-error {
    margin-bottom: 25px;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    text-align: center;
    margin-bottom: 40px;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 15px;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* ============================================
   AUTH CARD
   ============================================ */
.auth-card {
    max-width: 450px;
    margin: 0 auto 50px;
    text-align: center;
}

.auth-card h2 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--color-text);
}

.auth-card > p {
    color: var(--color-secondary);
    margin-bottom: 25px;
}

.auth-form {
    text-align: left;
}

/* ============================================
   FEATURES SECTION
   ============================================ */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature {
    text-align: center;
    padding: 30px 20px;
    background: var(--color-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

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

.feature h3 {
    font-size: 1.125rem;
    margin-bottom: 10px;
    color: var(--color-text);
}

.feature p {
    color: var(--color-secondary);
    font-size: 0.9rem;
}

/* ============================================
   DASHBOARD
   ============================================ */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.dashboard-header h1 {
    font-size: 1.75rem;
    color: var(--color-text);
}

.file-count {
    color: var(--color-secondary);
    font-size: 0.9rem;
}

/* ============================================
   UPLOAD AREA
   ============================================ */
.upload-card {
    margin-bottom: 30px;
}

.upload-area {
    border: 2px dashed var(--color-border);
    border-radius: var(--border-radius);
    padding: 50px 30px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--color-primary);
    background: rgba(107, 70, 193, 0.05);
}

.upload-area input[type="file"] {
    position: absolute;
    width: 0;
    height: 0;
    opacity: 0;
}

.upload-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 15px;
    color: var(--color-primary);
}

.upload-text {
    font-size: 1.125rem;
    color: var(--color-text);
    margin-bottom: 10px;
}

.upload-info {
    font-size: 0.875rem;
    color: var(--color-secondary);
}

.upload-nsfw-warning {
    font-size: 0.8rem;
    color: #991b1b;
    margin-top: 15px;
    line-height: 1.5;
    text-align: center;
}

.upload-nsfw-warning a {
    color: #991b1b;
    text-decoration: underline;
}

.upload-nsfw-warning a:hover {
    color: #7f1d1d;
}

.upload-terms {
    font-size: 0.8rem;
    margin-top: 10px;
    text-align: center;
}

.upload-terms a {
    color: var(--color-primary);
    text-decoration: none;
}

.upload-terms a:hover {
    text-decoration: underline;
}

.upload-terms i {
    font-size: 0.7rem;
    margin-left: 4px;
}

.upload-progress {
    padding: 20px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--color-border);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 15px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    color: var(--color-secondary);
    font-size: 0.9rem;
}

/* ============================================
   FILES LIST
   ============================================ */
.files-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 15px;
    background: var(--color-white);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.file-item:hover {
    box-shadow: var(--shadow-md);
}

.file-icon {
    font-size: 2rem;
    flex-shrink: 0;
    color: var(--color-primary);
}

.file-details {
    flex: 1;
    min-width: 0;
}

.file-name {
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 5px;
    word-break: break-word;
}

.file-meta {
    font-size: 0.8rem;
    color: var(--color-secondary);
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.file-actions {
    display: flex;
    gap: 10px;
    flex-shrink: 0;
}

/* ============================================
   EMPTY STATE
   ============================================ */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    background: var(--color-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.empty-icon {
    font-size: 4rem;
    display: block;
    margin-bottom: 15px;
    color: var(--color-primary);
    opacity: 0.5;
}

.empty-state p {
    color: var(--color-secondary);
    font-size: 1.1rem;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--color-header-footer);
    border-top: 1px solid #333;
    padding: 30px 0;
    text-align: center;
}

.footer-logo {
    margin-bottom: 15px;
}

.footer-logo img {
    height: 64px;
    width: auto;
}

.footer-copyright {
    color: #A0AEC0;
    font-size: 0.875rem;
    margin-bottom: 10px;
}

.footer-trademarks {
    color: #718096;
    font-size: 0.75rem;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.5;
}

.footer a {
    color: inherit;
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .file-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .file-actions {
        width: 100%;
        justify-content: flex-start;
    }
    
    .nav-right {
        flex-direction: column;
        align-items: flex-end;
        gap: 10px;
    }
    
    .user-email {
        font-size: 0.8rem;
    }
    
    .dashboard-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .card {
        padding: 20px;
    }
    
    .upload-area {
        padding: 30px 15px;
    }
    
    .btn {
        padding: 10px 20px;
    }
    
    .file-actions {
        flex-direction: column;
    }
    
    .file-actions .btn {
        width: 100%;
    }
}

/* ============================================
   REFERRAL SECTION
   ============================================ */
.referral-section {
    margin-top: 50px;
    padding-top: 40px;
    border-top: 2px solid #e2e8f0;
}

.referral-section h2 {
    font-size: 1.5rem;
    color: var(--color-text);
    margin-bottom: 10px;
}

.referral-section h2 i {
    margin-right: 10px;
    color: var(--color-primary);
}

.referral-subtitle {
    color: var(--color-secondary);
    margin-bottom: 30px;
}

.referral-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.referral-card,
.benefits-card,
.howto-card,
.stats-card {
    padding: 25px;
}

.referral-card h3,
.benefits-card h3,
.howto-card h3,
.stats-card h3,
.referrals-list-card h3 {
    font-size: 1rem;
    color: var(--color-text);
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #e2e8f0;
}

/* Referral Link Box */
.referral-link-box {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.referral-link-box input {
    width: 100%;
    padding: 12px;
    border: 1px solid #e2e8f0;
    border-radius: var(--border-radius);
    font-size: 0.85rem;
    background: #f8fafc;
    color: var(--color-text);
    box-sizing: border-box;
}

.referral-link-box .btn {
    white-space: nowrap;
    width: 100%;
}

/* Benefits List */
.benefits-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.benefits-list li {
    padding: 10px 0;
    border-bottom: 1px solid #f1f5f9;
    color: var(--color-text);
    font-size: 0.95rem;
}

.benefits-list li:last-child {
    border-bottom: none;
}

.benefits-list i {
    width: 24px;
    color: var(--color-primary);
    margin-right: 10px;
}

/* How It Works List */
.howto-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.howto-list li {
    padding: 10px 0;
    padding-left: 25px;
    position: relative;
    color: var(--color-secondary);
    font-size: 0.9rem;
    border-bottom: 1px solid #f1f5f9;
}

.howto-list li:last-child {
    border-bottom: none;
}

.howto-list li::before {
    content: "•";
    position: absolute;
    left: 8px;
    color: var(--color-primary);
    font-weight: bold;
}

/* Stats Card */
.referral-count {
    font-size: 2rem;
    font-weight: bold;
    color: var(--color-primary);
    margin-bottom: 15px;
}

.next-bonuses {
    list-style: none;
    padding: 0;
    margin: 0;
}

.next-bonuses li {
    padding: 8px 0;
    color: var(--color-secondary);
    font-size: 0.85rem;
}

.next-bonuses i {
    width: 20px;
    margin-right: 8px;
    color: var(--color-primary);
}

/* Referrals List */
.referrals-list-card {
    padding: 25px;
}

.referrals-list {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 300px;
    overflow-y: auto;
}

.referrals-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid #f1f5f9;
}

.referrals-list li:last-child {
    border-bottom: none;
}

.referral-email {
    color: var(--color-text);
    font-size: 0.95rem;
}

.referral-date {
    color: var(--color-secondary);
    font-size: 0.85rem;
}

.empty-referrals {
    color: var(--color-secondary);
    text-align: center;
    padding: 30px;
    font-style: italic;
}

/* Alert Info */
.alert-info {
    background: #e0f2fe;
    color: #0369a1;
    border: 1px solid #7dd3fc;
}

.alert-info i {
    margin-right: 8px;
}

/* Responsive */
@media (max-width: 768px) {
    .referral-grid {
        grid-template-columns: 1fr;
    }
    
    .referrals-list li {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }
}