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

:root {
    --bg: #0a0b10;
    --surface: rgba(26, 29, 39, 0.7);
    --surface-solid: #1a1d27;
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(108, 99, 255, 0.4);
    --primary: #6c63ff;
    --primary-hover: #5a52e0;
    --primary-glow: rgba(108, 99, 255, 0.15);
    --accent: #a78bfa;
    --text: #e4e4e7;
    --text-muted: #71717a;
    --error: #ef4444;
    --success: #22c55e;
    --radius: 12px;
    --radius-sm: 8px;
}

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

#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

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

a:hover {
    text-decoration: underline;
}

nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.5rem;
    background: rgba(26, 29, 39, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-logo {
    height: 32px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.btn-text {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
}

.btn-text:hover {
    color: var(--text);
    text-decoration: none;
}

.btn-primary-sm {
    display: inline-block;
    padding: 0.375rem 1rem;
    background: var(--primary);
    color: #fff;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    transition: background 0.2s;
}

.btn-primary-sm:hover {
    background: var(--primary-hover);
    text-decoration: none;
}

.landing {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 6rem 1.5rem 2rem;
    position: relative;
    z-index: 1;
}

.hero {
    text-align: center;
    max-width: 700px;
    padding-bottom: 4rem;
}

.hero-badge {
    display: inline-block;
    padding: 0.375rem 1rem;
    background: var(--primary-glow);
    border: 1px solid rgba(108, 99, 255, 0.3);
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #fff 0%, var(--accent) 50%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero > p {
    font-size: 1.125rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 2.5rem;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
}

.btn-primary-lg {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    background: var(--primary);
    color: #fff;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    box-shadow: 0 0 20px var(--primary-glow);
}

.btn-primary-lg:hover {
    background: var(--primary-hover);
    text-decoration: none;
    box-shadow: 0 0 30px rgba(108, 99, 255, 0.3);
    transform: translateY(-1px);
}

.btn-outline-lg {
    display: inline-flex;
    align-items: center;
    padding: 0.875rem 2rem;
    background: transparent;
    color: var(--text);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
}

.btn-outline-lg:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.2);
    text-decoration: none;
}

footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-muted);
    font-size: 0.8125rem;
    border-top: 1px solid var(--border);
}

.auth-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 1rem;
}

.auth-card {
    background: var(--surface-solid);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.5rem;
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.logo {
    height: 48px;
    margin-bottom: 1.5rem;
}

.auth-card h1 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1rem;
    text-align: left;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 0.375rem;
}

.form-group input {
    width: 100%;
    padding: 0.625rem 0.75rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 0.875rem;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus {
    border-color: var(--primary);
}

button {
    width: 100%;
    padding: 0.625rem;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    margin-top: 0.5rem;
}

button:hover {
    background: var(--primary-hover);
}

.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error);
    color: var(--error);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.8125rem;
    margin-bottom: 0.75rem;
}

.auth-link {
    margin-top: 1.25rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.badge {
    background: var(--primary);
    color: #fff;
    padding: 0.125rem 0.5rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.btn-secondary {
    width: auto;
    padding: 0.375rem 1rem;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    margin-top: 0;
}

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

.dashboard {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

.dashboard h1 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.dashboard > p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.card {
    background: var(--surface-solid);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.card h2 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.card > p {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.card button {
    width: auto;
    padding: 0.5rem 1.25rem;
}

#invite-result {
    margin-top: 1rem;
    padding: 0.75rem;
    background: var(--bg);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

#invite-result label {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

#invite-result code {
    font-family: "Courier New", monospace;
    font-size: 0.8125rem;
    color: var(--success);
    word-break: break-all;
    flex: 1;
}

.btn-small {
    width: auto;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    margin-top: 0;
}

.invite-table-wrap {
    margin-top: 1rem;
}

.invite-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.invite-table th {
    text-align: left;
    color: var(--text-muted);
    font-weight: 600;
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--border);
}

.invite-table td {
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--border);
}

.invite-table code {
    font-family: "Courier New", monospace;
    font-size: 0.8125rem;
}

.status-badge {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.status-available {
    background: rgba(34, 197, 94, 0.15);
    color: var(--success);
}

.status-used {
    background: rgba(239, 68, 68, 0.15);
    color: var(--error);
}

.status-admin {
    background: rgba(108, 99, 255, 0.15);
    color: var(--primary);
}

.empty-state {
    color: var(--text-muted);
    font-size: 0.875rem;
    text-align: center;
    padding: 1.5rem 0;
}

.features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    max-width: 960px;
    margin: 0 auto;
    padding: 0 1.5rem 3rem;
}

.feature-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    text-align: center;
    transition: all 0.3s;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.feature-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(108, 99, 255, 0.1);
}

.feature-icon-wrap {
    width: 48px;
    height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-glow);
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    color: var(--accent);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.feature-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.feature-card p {
    font-size: 0.8125rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.settings-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.setting-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.875rem 0;
    border-bottom: 1px solid var(--border);
}

.setting-row:last-child {
    border-bottom: none;
}

.setting-info {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.setting-label {
    font-size: 0.875rem;
    font-weight: 500;
}

.setting-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.toggle {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: var(--border);
    border-radius: 24px;
    transition: background 0.2s;
}

.toggle-slider::before {
    content: "";
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.2s;
}

.toggle input:checked + .toggle-slider {
    background: var(--primary);
}

.toggle input:checked + .toggle-slider::before {
    transform: translateX(20px);
}

.auth-back {
    display: block;
    text-align: left;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 1.25rem;
    text-decoration: none;
}

.auth-back:hover {
    color: var(--text);
    text-decoration: none;
}

.form-row {
    display: flex;
    align-items: center;
    margin-bottom: 0.75rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--primary);
    cursor: pointer;
}

.how-it-works {
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem 1.5rem 3rem;
    text-align: center;
}

.how-it-works h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 2rem;
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.step {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    text-align: center;
    backdrop-filter: blur(8px);
    transition: all 0.3s;
}

.step:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.step-number {
    width: 36px;
    height: 36px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 0.75rem;
}

.step h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.step p {
    font-size: 0.8125rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.stats-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1.5rem;
    max-width: 960px;
    margin: 0 auto;
    padding: 0 1.5rem 3rem;
}

.stat {
    text-align: center;
    padding: 1.75rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    backdrop-filter: blur(8px);
    transition: all 0.3s;
}

.stat:hover {
    border-color: var(--border-hover);
}

.stat-value {
    display: block;
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 0.375rem;
}

.stat-label {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.tech-section {
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem 1.5rem 3rem;
    text-align: center;
}

.tech-section h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 2rem;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
}

.tech-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 1.25rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: border-color 0.3s;
}

.tech-item:hover {
    border-color: var(--border-hover);
}

.tech-label {
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.tech-value {
    font-size: 1rem;
    font-weight: 700;
    color: var(--accent);
}

.cta-section {
    max-width: 640px;
    margin: 0 auto;
    padding: 3rem 1.5rem 4rem;
    text-align: center;
}

.cta-section h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.cta-section p {
    color: var(--text-muted);
    font-size: 1.0625rem;
    line-height: 1.6;
    margin-bottom: 2rem;
}

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

.fade-in {
    opacity: 0;
    transform: translateY(20px);
}

.fade-in.visible {
    animation: fadeInUp 0.6s ease forwards;
}