:root {
    --primary: #2D1B69;
    --primary-dark: #1A0F3F;
    --accent: #FF6B9D;
    --accent-light: #FFB4D1;
    --success: #06D6A0;
    --warning: #FFD93D;
    --danger: #EF476F;
    --bg-main: #0A0A0F;
    --bg-secondary: #15151F;
    --bg-tertiary: #1E1E2E;
    --text-primary: #FFFFFF;
    --text-secondary: #A0A0B8;
    --border: #2A2A3C;
    --shadow: rgba(255, 107, 157, 0.15);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'DM Sans', sans-serif;
    background: var(--bg-main);
    color: var(--text-primary);
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(45, 27, 105, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 107, 157, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(6, 214, 160, 0.15) 0%, transparent 50%);
    animation: gradientShift 20s ease infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes gradientShift {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(5%, 5%) rotate(5deg); }
}

.hidden {
    display: none !important;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 48px;
    max-width: 480px;
    width: 90%;
    position: relative;
    animation: slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(255, 255, 255, 0.05);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Auth Container */
.auth-header h1 {
    font-family: 'Playfair Display', serif;
    font-size: 48px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
}

.auth-header p {
    color: var(--text-secondary);
    font-size: 16px;
    margin-bottom: 32px;
}

.auth-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 32px;
    background: var(--bg-tertiary);
    padding: 4px;
    border-radius: 12px;
}

.tab-btn {
    flex: 1;
    padding: 12px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: var(--primary);
    color: var(--text-primary);
    box-shadow: 0 4px 12px var(--shadow);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

.input-group {
    margin-bottom: 16px;
}

.input-group input {
    width: 100%;
    padding: 16px;
    background: var(--bg-tertiary);
    border: 2px solid transparent;
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 15px;
    font-family: 'DM Sans', sans-serif;
    transition: all 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--bg-main);
}

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

.btn-primary {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
    border: none;
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: 'DM Sans', sans-serif;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.btn-primary:hover::before {
    opacity: 1;
}

.btn-primary span {
    position: relative;
    z-index: 1;
}

.divider {
    text-align: center;
    color: var(--text-secondary);
    margin: 24px 0;
    position: relative;
}

.divider::before,
.divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40%;
    height: 1px;
    background: var(--border);
}

.divider::before { left: 0; }
.divider::after { right: 0; }

.btn-google {
    width: 100%;
    padding: 16px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: all 0.3s ease;
    font-family: 'DM Sans', sans-serif;
}

.btn-google:hover {
    background: var(--bg-main);
    border-color: var(--accent);
    transform: translateY(-2px);
}

/* Header */
.header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo h1 {
    font-family: 'Playfair Display', serif;
    font-size: 32px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 24px;
}

.search-box {
    position: relative;
}

.search-box input {
    width: 300px;
    padding: 12px 16px 12px 44px;
    background: var(--bg-tertiary);
    border: 2px solid transparent;
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.3s ease;
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent);
    width: 400px;
}

.search-box svg {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.user-menu {
    position: relative;
}

.user-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px 8px 8px;
    background: var(--bg-tertiary);
    border: 2px solid transparent;
    border-radius: 24px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-primary);
    font-family: 'DM Sans', sans-serif;
}

.user-btn:hover {
    border-color: var(--accent);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
}

.dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 8px;
    min-width: 160px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    animation: slideDown 0.2s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.dropdown button {
    width: 100%;
    padding: 12px 16px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 14px;
    text-align: left;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: 'DM Sans', sans-serif;
}

.dropdown button:hover {
    background: var(--bg-tertiary);
}

/* Main Content */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 48px 32px;
}

/* Upload Section */
.upload-section {
    margin-bottom: 48px;
}

.dropzone {
    border: 3px dashed var(--border);
    border-radius: 24px;
    padding: 64px 32px;
    text-align: center;
    background: var(--bg-secondary);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.dropzone::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.dropzone:hover {
    border-color: var(--accent);
    transform: scale(1.01);
}

.dropzone:hover::before {
    opacity: 0.05;
}

.dropzone.dragover {
    border-color: var(--accent);
    background: var(--bg-tertiary);
    border-style: solid;
}

.dropzone.dragover::before {
    opacity: 0.1;
}

.dropzone-content {
    position: relative;
    z-index: 1;
}

.upload-icon {
    color: var(--accent);
    margin-bottom: 24px;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.dropzone h2 {
    font-size: 24px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

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

.btn-upload {
    padding: 14px 32px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
    border: none;
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: 'DM Sans', sans-serif;
}

.btn-upload:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--shadow);
}

/* Filter Section */
.filter-section {
    margin-bottom: 32px;
}

.filters {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 20px;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: 24px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: 'DM Sans', sans-serif;
}

.filter-btn:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
    border-color: transparent;
    color: var(--text-primary);
}

/* Files Grid */
.files-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.file-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
    animation: fadeInScale 0.4s ease;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.file-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
    border-color: var(--accent);
}

.file-preview {
    height: 180px;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.file-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.file-icon {
    font-size: 48px;
    color: var(--accent);
}

.file-info {
    padding: 20px;
}

.file-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.file-actions {
    display: flex;
    gap: 8px;
}

.action-btn {
    flex: 1;
    padding: 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.action-btn:hover {
    background: var(--primary);
    border-color: var(--accent);
}

.action-btn svg {
    width: 16px;
    height: 16px;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-secondary);
}

.empty-state svg {
    color: var(--border);
    margin-bottom: 24px;
}

.empty-state h3 {
    font-size: 24px;
    color: var(--text-primary);
    margin-bottom: 8px;
}

/* File Modal */
.file-modal {
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.close-btn {
    position: absolute;
    top: 24px;
    right: 24px;
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border: none;
    border-radius: 50%;
    color: var(--text-primary);
    font-size: 24px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-btn:hover {
    background: var(--danger);
    transform: rotate(90deg);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent);
    border-radius: 12px;
    padding: 16px 20px;
    min-width: 300px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    animation: slideInRight 0.3s ease;
    display: flex;
    align-items: center;
    gap: 12px;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--danger); }
.toast.warning { border-left-color: var(--warning); }

.toast-icon {
    font-size: 20px;
}

.toast-message {
    flex: 1;
    color: var(--text-primary);
    font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 16px;
    }

    .search-box input {
        width: 100%;
    }

    .search-box input:focus {
        width: 100%;
    }

    .files-grid {
        grid-template-columns: 1fr;
    }

    .modal-content {
        padding: 32px 24px;
    }

    .filters {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 8px;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Progress Bar */
.progress-bar {
    width: 100%;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 8px;
}

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