/* ============================================
   Component Styles
   ============================================ */

/* ===== Navigation ===== */
nav {
    padding: 20px 0;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    animation: fadeInDown 0.8s ease;
    transition: box-shadow var(--transition-base);
}

nav.scrolled {
    box-shadow: var(--shadow-sm);
    background: var(--glass-bg);
}

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

.logo-nav {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: transform var(--transition-fast);
}

.logo-nav:hover {
    transform: scale(1.02);
}

.logo-nav img {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    object-fit: cover;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-links {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-base);
    position: relative;
    padding: 8px 12px;
    border-radius: var(--radius-md);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 12px;
    right: 12px;
    height: 2px;
    background: var(--primary);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform var(--transition-base);
}

.nav-links a:hover {
    color: var(--text-primary);
}

.nav-links a:hover::after {
    transform: scaleX(1);
}

/* Theme Toggle Button */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    background: var(--bg-secondary);
    border-color: var(--text-tertiary);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-toggle-icon {
    font-size: 1rem;
    line-height: 1;
    transition: transform var(--transition-base);
}

.theme-toggle:hover .theme-toggle-icon {
    transform: rotate(15deg);
}

/* ===== Buttons ===== */
.btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-base);
    border: none;
    cursor: pointer;
    font-family: var(--font-sans);
    min-height: 48px;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width var(--transition-slow), height var(--transition-slow);
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.btn-primary:active {
    transform: translateY(0) scale(1);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
}

.btn-primary:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 4px;
}

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

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary:active {
    transform: translateY(0);
    background: var(--bg-tertiary);
    transition: all var(--transition-fast);
}

/* ===== Feature Cards ===== */
.feature-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-amount)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--blur-amount)) saturate(180%);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    transition: all var(--transition-slow);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top left, var(--primary-subtle) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.feature-card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: var(--primary);
    box-shadow: var(--shadow-xl);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-card:active {
    transform: translateY(-4px) scale(1.01);
    transition: all var(--transition-fast);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    display: inline-block;
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 4px 12px rgba(10, 132, 255, 0.3));
    transition: transform var(--transition-base);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

.feature-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.feature-description {
    color: var(--text-tertiary);
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

/* App Icon */
.app-icon-large {
    width: 140px;
    height: 140px;
    margin: 0 auto 40px;
    border-radius: 32px;
    box-shadow: 0 20px 60px rgba(10, 132, 255, 0.4),
                0 0 0 1px rgba(255, 255, 255, 0.1);
    animation: floatIcon 3s ease-in-out infinite;
    position: relative;
    object-fit: cover;
    display: block;
}

.app-icon-large::before {
    content: '';
    position: absolute;
    inset: -20px;
    background: radial-gradient(circle, rgba(10, 132, 255, 0.2) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

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

@keyframes pulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.1); }
}

/* Visual Items */
.visual-item {
    background: var(--bg-elevated);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    animation: slideInRight 0.6s var(--ease-spring) forwards;
    opacity: 0;
    transition: all var(--transition-base);
    cursor: default;
}

.visual-item:hover {
    transform: translateX(4px);
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.visual-item:nth-child(1) { animation-delay: 0.1s; }
.visual-item:nth-child(2) { animation-delay: 0.2s; }
.visual-item:nth-child(3) { animation-delay: 0.3s; }

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.visual-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
    transition: all var(--transition-base);
}

.visual-item:hover .visual-icon {
    transform: scale(1.1) rotate(5deg);
}

.icon-blue {
    background: var(--primary-subtle);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.2);
}

.icon-green {
    background: rgba(52, 199, 89, 0.2);
    box-shadow: 0 4px 12px rgba(52, 199, 89, 0.2);
}

.icon-purple {
    background: rgba(175, 82, 222, 0.2);
    box-shadow: 0 4px 12px rgba(175, 82, 222, 0.2);
}

.visual-content {
    flex: 1;
}

.visual-title {
    font-weight: 600;
    margin-bottom: 4px;
}

.visual-subtitle {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

/* Badges */
.privacy-badge {
    display: inline-block;
    background: rgba(50, 215, 75, 0.2);
    color: var(--accent);
    padding: 8px 20px;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 24px;
    border: 1px solid var(--accent);
}

/* Stat */
.stat {
    text-align: center;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    display: block;
}

.stat-label {
    color: var(--text-tertiary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

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

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

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}