/* layout.css - Shared Layout Styles for ltth.app */

/* ===================================
   Navigation Dropdown Styles
   =================================== */

.nav-dropdown {
    position: relative;
}

.nav-dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    cursor: pointer;
}

.nav-dropdown-arrow {
    transition: transform 0.2s ease;
    flex-shrink: 0;
}

.nav-dropdown.open .nav-dropdown-arrow {
    transform: rotate(180deg);
}

.nav-dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    background: var(--color-surface, #1a1b1d);
    border: 1px solid var(--color-border, #2a2b2d);
    border-radius: 0.75rem;
    padding: 0.5rem;
    min-width: 220px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    z-index: 200;
    animation: dropdownIn 0.15s ease;
}

.nav-dropdown.open .nav-dropdown-menu {
    display: block;
}

@keyframes dropdownIn {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}

.nav-dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 0.75rem;
    border-radius: 0.5rem;
    color: var(--color-text, #f5f7f4);
    text-decoration: none;
    font-size: 0.9rem;
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
}

.nav-dropdown-item:hover {
    background: rgba(18, 161, 22, 0.15);
    color: var(--color-primary, #12a116);
}

/* ===================================
   Feature Card Grid
   =================================== */

.feature-cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin: 2rem 0;
}

@media (max-width: 900px) {
    .feature-cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .feature-cards-grid {
        grid-template-columns: 1fr;
    }
}

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

.feature-card-item {
    background: var(--color-surface, #1a1b1d);
    border: 1px solid var(--color-border, #2a2b2d);
    border-radius: 1rem;
    padding: 1.75rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    height: 100%;
}

.feature-card-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(18, 161, 22, 0.15);
    border-color: var(--color-primary, #12a116);
}

.feature-card-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
}

.feature-card-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--color-text, #f5f7f4);
}

.feature-card-desc {
    font-size: 0.9rem;
    color: var(--color-text-secondary, #b5b7b4);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.feature-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.feature-tag {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    background: rgba(18, 161, 22, 0.12);
    color: var(--color-primary, #12a116);
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.feature-tag-new {
    background: rgba(100, 18, 161, 0.2);
    color: #a855f7;
}

/* ===================================
   Sub-Page Layout (Sidebar + Content)
   =================================== */

.subpage-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 2.5rem;
    align-items: start;
    padding: 2rem 0;
}

@media (max-width: 860px) {
    .subpage-layout {
        grid-template-columns: 1fr;
    }
}

.subpage-sidebar {
    position: sticky;
    top: 5rem;
}

.subpage-sidebar-nav {
    background: var(--color-surface, #1a1b1d);
    border: 1px solid var(--color-border, #2a2b2d);
    border-radius: 1rem;
    padding: 1.25rem;
}

.subpage-sidebar-nav h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-secondary, #b5b7b4);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-border, #2a2b2d);
}

.subpage-sidebar-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.subpage-sidebar-nav li a {
    display: block;
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    color: var(--color-text-secondary, #b5b7b4);
    text-decoration: none;
    font-size: 0.9rem;
    transition: background 0.15s, color 0.15s;
}

.subpage-sidebar-nav li a:hover,
.subpage-sidebar-nav li a.active {
    background: rgba(18, 161, 22, 0.12);
    color: var(--color-primary, #12a116);
}

/* ===================================
   Breadcrumb Navigation
   =================================== */

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--color-text-secondary, #b5b7b4);
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.breadcrumb a {
    color: var(--color-text-secondary, #b5b7b4);
    text-decoration: none;
    transition: color 0.15s;
}

.breadcrumb a:hover {
    color: var(--color-primary, #12a116);
}

.breadcrumb-sep {
    opacity: 0.5;
}

.breadcrumb-current {
    color: var(--color-text, #f5f7f4);
    font-weight: 500;
}

/* ===================================
   Version Badge
   =================================== */

.version-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.2rem 0.65rem;
    background: rgba(18, 161, 22, 0.15);
    color: var(--color-primary, #12a116);
    border: 1px solid rgba(18, 161, 22, 0.3);
    border-radius: 9999px;
    font-size: 0.8rem;
    font-weight: 600;
    font-family: var(--font-mono, monospace);
}

/* ===================================
   Mobile Hamburger Open State
   =================================== */

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-surface, #1a1b1d);
        border-bottom: 1px solid var(--color-border, #2a2b2d);
        padding: 1rem;
        gap: 0.25rem;
        z-index: 100;
        box-shadow: 0 8px 24px rgba(0,0,0,0.3);
    }
    
    .nav-menu.open {
        display: flex;
    }
    
    .nav-toggle.open span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .nav-toggle.open span:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle.open span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .nav-dropdown-menu {
        position: static;
        box-shadow: none;
        border: none;
        background: rgba(18, 161, 22, 0.05);
        margin: 0.25rem 0;
    }
    
    .lang-dropdown .lang-dropdown-menu {
        position: static;
    }
}

/* ===================================
   Feature Section Hero
   =================================== */

.feature-hero {
    padding: 5rem 0 3rem;
    text-align: center;
}

.feature-hero-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    display: block;
}

.feature-hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--color-primary, #12a116), #42ff73);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feature-hero-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-secondary, #b5b7b4);
    max-width: 650px;
    margin: 0 auto 2rem;
    line-height: 1.7;
}

/* ===================================
   Section dividers
   =================================== */

.section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border, #2a2b2d), transparent);
    margin: 3rem 0;
}