/* ===== Variables ===== */
:root {
    --bg-primary: #050510;
    --bg-secondary: #0a0a1f;
    --bg-card: rgba(255, 255, 255, 0.03);
    --border: rgba(255, 255, 255, 0.08);
    --text-primary: #e8e8ff;
    --text-secondary: #8888aa;
    --accent-1: #667eea;
    --accent-2: #764ba2;
    --accent-3: #f093fb;
    --glow: rgba(102, 126, 234, 0.4);
    --success: #22c55e;
    --error: #ef4444;
    --radius: 12px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

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

a { color: var(--accent-1); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-3); }

/* ===== Canvas Background ===== */
#particle-canvas {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0;
    pointer-events: none;
}

.page-wrapper { position: relative; z-index: 1; }

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 0 40px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(5, 5, 16, 0.7);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: all var(--transition);
}

.navbar.scrolled {
    background: rgba(5, 5, 16, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-brand .logo-icon {
    width: 36px; height: 36px;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse-glow 3s ease-in-out infinite;
}

.nav-brand .logo-icon svg { width: 20px; height: 20px; color: #fff; }

.nav-links { display: flex; align-items: center; gap: 8px; }

.nav-links a {
    padding: 8px 18px;
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition);
}

.nav-links a:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }

.btn-nav {
    padding: 8px 20px !important;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2)) !important;
    color: #fff !important;
    border-radius: 8px !important;
    font-weight: 600 !important;
}

.btn-nav:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px var(--glow);
    color: #fff !important;
}

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

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 40px 80px;
    position: relative;
}

.hero-content { max-width: 800px; }

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid rgba(102, 126, 234, 0.3);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--accent-1);
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease;
}

.hero-badge .dot {
    width: 8px; height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: blink 2s ease-in-out infinite;
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease 0.1s both;
}

.hero h1 .gradient-text {
    background: linear-gradient(135deg, var(--accent-1), var(--accent-3), var(--accent-2));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 4s ease infinite;
}

.hero p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.3s both;
}

.btn-primary {
    padding: 14px 32px;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--glow);
}

.btn-secondary {
    padding: 14px 32px;
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.05);
    border-color: rgba(255,255,255,0.2);
}

/* ===== Features Section ===== */
.features-section {
    padding: 100px 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.section-header p { color: var(--text-secondary); font-size: 1.05rem; }

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
    cursor: default;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-1), var(--accent-3));
    transform: scaleX(0);
    transition: transform var(--transition);
}

.feature-card:hover {
    transform: translateY(-6px);
    border-color: rgba(102, 126, 234, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.feature-card:hover::before { transform: scaleX(1); }

.feature-icon {
    width: 48px; height: 48px;
    background: linear-gradient(135deg, rgba(102,126,234,0.2), rgba(118,75,162,0.2));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.4rem;
}

.feature-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 20px;
    color: var(--text-secondary);
}

.empty-state .empty-icon { font-size: 3rem; margin-bottom: 16px; opacity: 0.5; }

.feature-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.feature-card-link .feature-card {
    cursor: pointer;
    height: 100%;
}

.feature-card-link .feature-card::after {
    content: '→';
    position: absolute;
    bottom: 24px;
    right: 24px;
    font-size: 1.2rem;
    color: var(--accent-1);
    opacity: 0;
    transform: translateX(-8px);
    transition: all var(--transition);
}

.feature-card-link:hover .feature-card::after {
    opacity: 1;
    transform: translateX(0);
}

/* ===== Footer ===== */
.site-footer {
    padding: 40px;
    text-align: center;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ===== Auth Pages ===== */
.auth-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 40px;
    backdrop-filter: blur(20px);
    animation: fadeInUp 0.6s ease;
}

.auth-header { text-align: center; margin-bottom: 32px; }

.auth-icon {
    width: 56px; height: 56px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-icon svg { width: 28px; height: 28px; color: #fff; }

.auth-header h2 { font-size: 1.5rem; margin-bottom: 6px; }
.auth-header p { color: var(--text-secondary); font-size: 0.9rem; }

.auth-form .form-group { margin-bottom: 20px; }

.auth-form label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.auth-form input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all var(--transition);
    outline: none;
}

.auth-form input:focus {
    border-color: var(--accent-1);
    box-shadow: 0 0 0 3px rgba(102,126,234,0.15);
}

.password-wrap {
    position: relative;
}

.password-wrap input {
    padding-right: 44px;
}

.password-toggle {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    background: none;
    border: none;
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color var(--transition), background var(--transition);
}

.password-toggle:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.06);
}

.password-toggle svg {
    width: 18px;
    height: 18px;
}

.password-toggle .icon-eye-off { display: none; }
.password-toggle.visible .icon-eye { display: none; }
.password-toggle.visible .icon-eye-off { display: block; }

.form-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: -8px 0 16px;
    gap: 12px;
}

.remember-check {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.remember-check input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent-1);
    cursor: pointer;
}

.forgot-link {
    font-size: 0.85rem;
    color: var(--accent-1);
    white-space: nowrap;
}

.forgot-link:hover { color: var(--accent-3); }

.label-hint {
    font-weight: 400;
    color: var(--text-secondary);
    opacity: 0.8;
}

.label-required { color: var(--accent-3); }

.auth-select {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all var(--transition);
    outline: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238888aa' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
}

.auth-select:focus {
    border-color: var(--accent-1);
    box-shadow: 0 0 0 3px rgba(102,126,234,0.15);
}

.auth-select option {
    background: #1a1a2e;
    color: var(--text-primary);
}

.reset-steps {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 24px;
    font-size: 0.8rem;
}

.reset-steps span {
    padding: 4px 12px;
    border-radius: 20px;
    color: var(--text-secondary);
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
}

.reset-steps span.active {
    color: var(--accent-1);
    border-color: rgba(102,126,234,0.4);
    background: rgba(102,126,234,0.1);
}

.verify-methods {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.verify-option {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: all var(--transition);
}

.verify-option:has(input:checked) {
    border-color: rgba(102,126,234,0.5);
    background: rgba(102,126,234,0.08);
    color: var(--text-primary);
}

.verify-option input[type="radio"] {
    width: auto;
    margin-top: 3px;
    accent-color: var(--accent-1);
}

.captcha-row { display: flex; gap: 12px; align-items: center; }
.captcha-row input { flex: 1; }

.captcha-img {
    height: 42px;
    border-radius: 8px;
    cursor: pointer;
    border: 1px solid var(--border);
    transition: opacity var(--transition);
}

.captcha-img:hover { opacity: 0.8; }

.captcha-hint {
    margin-top: 6px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.btn-block { width: 100%; justify-content: center; margin-top: 8px; }

.auth-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.alert {
    padding: 12px 16px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 0.9rem;
}

.alert-error {
    background: rgba(239,68,68,0.1);
    border: 1px solid rgba(239,68,68,0.3);
    color: #fca5a5;
}

.alert-success {
    background: rgba(34,197,94,0.1);
    border: 1px solid rgba(34,197,94,0.3);
    color: #86efac;
}

.auth-back {
    position: fixed;
    top: 24px; left: 24px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    z-index: 10;
    transition: color var(--transition);
}

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

/* ===== Flash Toast ===== */
.toast {
    position: fixed;
    top: 90px;
    right: 20px;
    z-index: 200;
    padding: 14px 24px;
    border-radius: 10px;
    font-size: 0.9rem;
    animation: slideInRight 0.4s ease, fadeOut 0.4s ease 3s forwards;
    max-width: 360px;
}

.toast-success {
    background: rgba(34,197,94,0.15);
    border: 1px solid rgba(34,197,94,0.3);
    color: #86efac;
}

.toast-error {
    background: rgba(239,68,68,0.15);
    border: 1px solid rgba(239,68,68,0.3);
    color: #fca5a5;
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 0 0 var(--glow); }
    50% { box-shadow: 0 0 20px 5px var(--glow); }
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(40px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeOut {
    to { opacity: 0; transform: translateX(40px); }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .navbar { padding: 0 20px; }
    .hero { padding: 100px 20px 60px; }
    .features-section { padding: 60px 20px; }
    .features-grid { grid-template-columns: 1fr; }
    .nav-links a:not(.btn-nav):not(.btn-nav-outline) { display: none; }
}