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

:root {
    --bg-primary: #0A0A0A;
    --bg-secondary: #111111;
    --bg-tertiary: #1A1A1A;
    --bg-elevated: #1E1E1E;
    --text-primary: #FFFFFF;
    --text-secondary: #A3A3A3;
    --text-tertiary: #737373;
    --border-primary: #2A2A2A;
    --border-secondary: #404040;
    --border-hover: #525252;
    --accent: #FFFFFF;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Roboto, sans-serif;
    background: var(--bg-primary);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-primary);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(10, 10, 10, 0.95);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.nav-buttons {
    display: flex;
    gap: 0.75rem;
}

/* User Menu */
.user-menu {
    position: relative;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    padding: 8px 16px;
    border-radius: 100px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    transition: all 0.2s ease;
}

.user-info:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-secondary);
}

.avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--border-secondary);
}

.dropdown-icon {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 8rem 0 6rem;
    background: var(--bg-primary);
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
    letter-spacing: -1px;
    color: var(--text-primary);
}

.subtitle {
    font-size: 1.25rem;
    margin-bottom: 3rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--bg-secondary);
    padding: 2.5rem 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-primary);
    transition: all 0.3s ease;
}

.feature-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-tertiary);
}

.feature-card h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
    font-family: inherit;
}

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

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

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

.btn-outline:hover {
    background: var(--bg-secondary);
    border-color: var(--border-hover);
}

.btn-full {
    width: 100%;
    padding: 12px;
    margin-top: 1rem;
}

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

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

.btn-danger:hover {
    background: var(--text-secondary);
    border-color: var(--text-secondary);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    animation: fadeIn 0.2s;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--bg-secondary);
    padding: 2.5rem;
    border-radius: 16px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: slideIn 0.3s;
    border: 1px solid var(--border-primary);
}

.close {
    position: absolute;
    right: 20px;
    top: 15px;
    font-size: 1.75rem;
    cursor: pointer;
    color: var(--text-tertiary);
    transition: color 0.2s;
    font-weight: 300;
}

.close:hover {
    color: var(--text-primary);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group input[type="password"],
.form-group input[type="date"] {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border-secondary);
    border-radius: 8px;
    font-size: 0.95rem;
    transition: all 0.2s;
    font-family: inherit;
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.form-group input:focus {
    outline: none;
    border-color: var(--text-primary);
    background: var(--bg-elevated);
}

.form-group input:disabled {
    background: var(--bg-secondary);
    color: var(--text-tertiary);
    cursor: not-allowed;
    border-color: var(--border-primary);
}

.form-group input[type="file"] {
    width: 100%;
    padding: 10px;
    border: 2px dashed var(--border-secondary);
    border-radius: 8px;
    cursor: pointer;
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.image-preview {
    margin-top: 1rem;
    text-align: center;
}

.image-preview img {
    max-width: 200px;
    max-height: 200px;
    border-radius: 10px;
    border: 1px solid var(--border-primary);
}

.error-message {
    color: var(--text-primary);
    padding: 12px;
    margin: 10px 0;
    border-radius: 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    display: none;
    font-size: 0.9rem;
}

.error-message.active {
    display: block;
}

.success-message {
    color: var(--bg-primary);
    padding: 12px;
    margin: 10px 0;
    border-radius: 8px;
    background: var(--text-primary);
    border: 1px solid var(--text-primary);
    display: none;
    font-size: 0.9rem;
}

.success-message.active {
    display: block;
}

.switch-auth {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.switch-auth a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px solid var(--text-primary);
}

.switch-auth a:hover {
    opacity: 0.7;
}

/* Accounts Popup */
.accounts-popup {
    position: absolute;
    top: 70px;
    right: 20px;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-primary);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    min-width: 350px;
    z-index: 999;
    animation: slideDown 0.2s;
}

.popup-header {
    padding: 1.25rem;
    border-bottom: 1px solid var(--border-primary);
}

.popup-header h3 {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
}

.sessions-list {
    padding: 1rem;
    max-height: 300px;
    overflow-y: auto;
}

.session-item {
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
    margin-bottom: 0.75rem;
    border: 1px solid var(--border-primary);
}

.session-item h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
}

.session-item p {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin: 3px 0;
}

.popup-footer {
    padding: 1rem 1.25rem;
    border-top: 1px solid var(--border-primary);
    display: flex;
    gap: 10px;
    justify-content: space-between;
}

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

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

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}
.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}
.btn-large {
    padding: 14px 32px;
    font-size: 1rem;
}
.section {
    padding: 5rem 0;
}
.section-dark {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-primary);
    border-bottom: 1px solid var(--border-primary);
}
.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    font-weight: 700;
    color: var(--text-primary);
}
.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}
.step-card {
    text-align: center;
    padding: 2rem 1.5rem;
}
.step-number {
    width: 60px;
    height: 60px;
    background: var(--text-primary);
    color: var(--bg-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1.5rem;
}
.step-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}
.step-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}
.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}
.feature-icon-svg {
    width: 48px;
    height: 48px;
    margin: 0 auto 1.5rem;
    color: var(--text-primary);
}
.code-example {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: 12px;
    overflow: hidden;
    max-width: 800px;
    margin: 0 auto;
}
.code-example-header {
    background: var(--bg-tertiary);
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid var(--border-primary);
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}
.code-example pre {
    padding: 1.5rem;
    overflow-x: auto;
    margin: 0;
}
.code-example code {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--text-primary);
}
.section-cta {
    text-align: center;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}
.section-cta h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-primary);
    padding: 3rem 0 1.5rem;
}
.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}
.footer-section h4 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1rem;
    font-weight: 600;
}
.footer-section p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}
.footer-section a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    transition: color 0.2s;
}
.footer-section a:hover {
    color: var(--text-primary);
}
.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-primary);
    color: var(--text-tertiary);
    font-size: 0.875rem;
}
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    .subtitle, .hero-subtitle {
        font-size: 1rem;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
    .accounts-popup {
        right: 10px;
        min-width: 300px;
    }
    .features, .steps, .features-grid {
        grid-template-columns: 1fr;
    }
    .section-title {
        font-size: 2rem;
    }
    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    .btn-large {
        width: 100%;
    }
}