/* ============================================
   Glassmorphism System - iOS 18 Style
   ============================================ */

/* Core glass card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: 
        0 1px 0 var(--glass-highlight) inset,
        var(--shadow-md);
    transition: 
        transform var(--transition-spring),
        box-shadow var(--transition-spring),
        border-color var(--transition-base);
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
}

.glass-card:hover {
    transform: translateY(-4px);
    box-shadow: 
        0 1px 0 var(--glass-highlight) inset,
        var(--shadow-lg);
    border-color: rgba(255, 255, 255, 0.12);
}

.glass-card:active {
    transform: translateY(-2px) scale(0.98);
    transition: transform 0.1s ease;
}

/* Large glass card */
.glass-card-lg {
    border-radius: var(--radius-2xl);
    padding: 1.5rem;
}

@media (min-width: 768px) {
    .glass-card-lg {
        padding: 2rem;
    }
}

/* Glass button */
.glass-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-family: var(--font-stack);
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: 
        transform var(--transition-spring),
        box-shadow var(--transition-base),
        background var(--transition-base);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
    letter-spacing: -0.01em;
}

.glass-button::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(255,255,255,0.1) 0%, transparent 50%);
    pointer-events: none;
}

.glass-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: rgba(255, 255, 255, 0.15);
}

.glass-button:active {
    transform: translateY(0) scale(0.96);
    transition: transform 0.1s ease;
}

.glass-button.primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    border: none;
    color: white;
    box-shadow: 0 4px 20px rgba(10, 132, 255, 0.3);
}

.glass-button.primary:hover {
    box-shadow: 0 6px 24px rgba(10, 132, 255, 0.4);
}

.glass-button.small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.glass-button.large {
    padding: 1rem 2rem;
    font-size: 1rem;
}

/* Glass pill badge */
.glass-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.875rem;
    background: var(--glass-bg);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.glass-pill:hover {
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.15);
}

.glass-pill.accent {
    background: rgba(10, 132, 255, 0.15);
    border-color: rgba(10, 132, 255, 0.2);
    color: var(--accent);
}

.glass-pill.green {
    background: rgba(48, 209, 88, 0.15);
    border-color: rgba(48, 209, 88, 0.2);
    color: var(--accent-green);
}

.glass-pill.orange {
    background: rgba(255, 159, 10, 0.15);
    border-color: rgba(255, 159, 10, 0.2);
    color: var(--accent-orange);
}

.glass-pill.pink {
    background: rgba(255, 55, 95, 0.15);
    border-color: rgba(255, 55, 95, 0.2);
    color: var(--accent-tertiary);
}

/* Glass navigation bar */
.glass-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--nav-height);
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    padding-left: calc(1rem + var(--safe-left));
    padding-right: calc(1rem + var(--safe-right));
    transition: all var(--transition-base);
}

.glass-nav.scrolled {
    background: rgba(15, 15, 15, 0.85);
    border-bottom-color: rgba(255, 255, 255, 0.05);
}

@media (prefers-color-scheme: light) {
    .glass-nav.scrolled {
        background: rgba(245, 245, 247, 0.85);
    }
}

.glass-nav-title {
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* Glass tab bar (bottom) */
.glass-tabbar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--tabbar-height);
    padding-bottom: var(--safe-bottom);
    background: var(--glass-bg);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-top: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: space-around;
    padding-left: var(--safe-left);
    padding-right: var(--safe-right);
}

.tabbar-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    padding: 0.5rem 1rem;
    color: var(--text-tertiary);
    font-size: 0.625rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    background: none;
    position: relative;
}

.tabbar-item.active {
    color: var(--accent);
}

.tabbar-item .tab-icon {
    width: 24px;
    height: 24px;
    transition: transform var(--transition-spring);
}

.tabbar-item.active .tab-icon {
    transform: translateY(-2px);
}

/* Tab indicator dot */
.tabbar-item.active::after {
    content: '';
    position: absolute;
    bottom: 4px;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--accent);
}

/* Glass input */
.glass-input {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--separator-light);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-stack);
    font-size: 0.9375rem;
    transition: all var(--transition-base);
    outline: none;
}

.glass-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(10, 132, 255, 0.15);
}

.glass-input::placeholder {
    color: var(--text-tertiary);
}

/* Glass textarea */
.glass-textarea {
    composes: glass-input;
    min-height: 120px;
    resize: vertical;
    line-height: 1.6;
}

/* Hero glass panel */
.hero-glass {
    background: linear-gradient(135deg, 
        rgba(10, 132, 255, 0.15) 0%, 
        rgba(94, 92, 230, 0.1) 50%,
        rgba(255, 55, 95, 0.05) 100%);
    backdrop-filter: blur(40px) saturate(180%);
    -webkit-backdrop-filter: blur(40px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-2xl);
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.hero-glass::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 100%;
    background: radial-gradient(circle, rgba(10, 132, 255, 0.2) 0%, transparent 70%);
    filter: blur(40px);
    pointer-events: none;
}

.hero-glass::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 50%;
    height: 80%;
    background: radial-gradient(circle, rgba(94, 92, 230, 0.15) 0%, transparent 70%);
    filter: blur(40px);
    pointer-events: none;
}

/* Glass divider */
.glass-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--separator), transparent);
    margin: 2rem 0;
    border: none;
}

/* Glass image container */
.glass-image-container {
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    background: var(--bg-tertiary);
}

.glass-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.glass-image-container:hover img {
    transform: scale(1.05);
}

/* Shimmer effect for loading */
.glass-shimmer {
    background: linear-gradient(
        90deg,
        var(--bg-tertiary) 0%,
        var(--bg-secondary) 50%,
        var(--bg-tertiary) 100%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-md);
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}