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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #f8fafc;
    --accent: #06d6a0;
    --text: #1e293b;
    --text-light: #64748b;
    --glass: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    --neumorph: 5px 5px 10px #d1d9e6, -5px -5px 10px #ffffff;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 1200px;
}

/* Glass Card */
.glass-card {
    background: var(--glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

/* Auth Container */
.auth-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    min-height: 600px;
}

.logo-section {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: white;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.logo i {
    font-size: 3rem;
    color: var(--accent);
}

.logo h1 {
    font-size: 2.5rem;
    font-weight: 700;
}

.logo-section p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* Form Styles */
.form-container {
    background: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: var(--neumorph);
    position: relative;
    overflow: hidden;
}

.form-section {
    display: none;
}

.form-section.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.form-section h2 {
    color: var(--text);
    margin-bottom: 30px;
    text-align: center;
    font-size: 2rem;
}

.input-group {
    position: relative;
    margin-bottom: 25px;
}

.input-group i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    transition: all 0.3s ease;
}

.input-group input {
    width: 100%;
    padding: 15px 15px 15px 45px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: var(--secondary);
}

.input-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    outline: none;
}

.input-group input:focus + i {
    color: var(--primary);
}

.toggle-password {
    left: auto !important;
    right: 15px;
    cursor: pointer;
}

/* Button Styles */
.btn-primary {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.3);
}

.switch-form {
    text-align: center;
    margin-top: 20px;
    color: var(--text-light);
}

.switch-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.switch-link:hover {
    text-decoration: underline;
}

.admin-link {
    text-align: center;
    margin-top: 15px;
}

.admin-link a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.9rem;
}

.admin-link a:hover {
    color: var(--primary);
}

/* Notification */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 25px;
    border-radius: 10px;
    color: white;
    font-weight: 600;
    z-index: 1000;
    transform: translateX(150%);
    transition: transform 0.3s ease;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    background: var(--accent);
}

.notification.error {
    background: #ef4444;
}

/* Dashboard Styles */
.dashboard {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 30px;
    min-height: 100vh;
}

.sidebar {
    background: var(--glass);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    border: 1px solid var(--glass-border);
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 40px;
}

.user-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid white;
}

.sidebar-nav {
    list-style: none;
}

.sidebar-nav li {
    margin-bottom: 10px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 15px;
    color: white;
    text-decoration: none;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    background: rgba(255, 255, 255, 0.1);
}

.main-content {
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: var(--neumorph);
}

.storage-info {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 30px;
}

.storage-bar {
    height: 10px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 5px;
    margin: 15px 0;
    overflow: hidden;
}

.storage-used {
    height: 100%;
    background: var(--accent);
    border-radius: 5px;
    transition: width 0.3s ease;
}

/* File Cards */
.files-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.file-card {
    background: var(--secondary);
    border-radius: 15px;
    padding: 20px;
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
}

.file-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

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

.file-actions {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.btn-icon {
    padding: 8px 12px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.9rem;
}

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

.btn-delete {
    background: #ef4444;
    color: white;
}

/* Plans Grid */
.plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.plan-card {
    background: white;
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.plan-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
}

.plan-card.featured {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
}

.plan-price {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 15px 0;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: white;
    border-radius: 20px;
    padding: 30px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

/* Responsive */
@media (max-width: 768px) {
    .auth-container {
        grid-template-columns: 1fr;
    }
    
    .dashboard {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        order: 2;
    }
    
    .main-content {
        order: 1;
    }
    
    .files-grid {
        grid-template-columns: 1fr;
    }
    
    .plans-grid {
        grid-template-columns: 1fr;
    }
}