/* MOPy Photography - Simplified Main Styles */

/* ===== CSS VARIABLES FOR THEMING ===== */
:root {
    --bg-color: #ffffff;
    --text-color: #212529;
    --card-bg: #ffffff;
    --border-color: #dee2e6;
    --shadow-light: rgba(0, 0, 0, 0.1);
    --active-line: #292929;
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --text-color: #e1e1e1;
    --card-bg: #2d2d2d;
    --border-color: #495057;
    --shadow-light: rgba(255, 255, 255, 0.1);
    --active-line: #e4e4e4;
}

/* ===== BASE STYLES ===== */
html, body {
    height: 100%;
    font-family: 'Questrial', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* ===== HEADER & NAVIGATION ===== */
.header {
    background-color: var(--bg-color);
    transition: background-color 0.3s ease;
    z-index: 10;
    top: 0;
    left: 0;
    width: 100%;
    padding-top: 10px;
}

.navbar-nav .nav-item.active a:before {
    content: '';
    position: absolute;
    top: -10px;
    margin-left: -7px;
    width: 58px;
    background: var(--active-line);
    height: 3px;
}

.nav-link {
    color: var(--text-color) !important;
    transition: opacity 0.3s ease;
}

.nav-link:hover {
    opacity: 0.7;
}

/* ===== THEME TOGGLE BUTTON ===== */
.theme-toggle {
    border: 1px solid var(--border-color);
    color: var(--text-color);
    background: var(--card-bg);
    border-radius: 8px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

/* Theme icon visibility */
[data-theme="light"] .theme-icon-light,
[data-theme="dark"] .theme-icon-dark {
    display: none;
}

/* Logo visibility */
.logo-dark-mode {
    display: none;
}

[data-theme="dark"] .logo-dark-mode {
    display: block;
}

[data-theme="dark"] .logo-light-mode {
    display: none;
}

/* ===== CARDS & GALLERY ===== */
.card {
    background-color: var(--card-bg);
    color: var(--text-color);
    border-color: var(--border-color);
    border-radius: 8px;
    transition: all 0.3s ease;
    overflow: hidden;
}

.card:hover {
    box-shadow: 0 20px 40px 0 var(--shadow-light);
    transform: translateY(-2px);
}

.card-img-top {
    transition: transform 0.3s ease;
}

.card-columns {
    column-count: 4;
    column-gap: 1rem;
}

/* ===== LAZY LOADING ===== */
.lazy {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lazy.loaded {
    opacity: 1;
}

.loading-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
}

.loaded + .loading-icon {
    display: none;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1200px) {
    .card-columns {
        column-count: 3;
    }
}

@media (max-width: 768px) {
    .card-columns {
        column-count: 2;
    }    
}

@media (max-width: 576px) {
    .card-columns {
        column-count: 1;
    }
}

/* ===== NAVBAR TOGGLER (Mobile) ===== */
.navbar-toggler {
    border-color: var(--border-color);
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%2833, 37, 41, 0.75%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

[data-theme="dark"] .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.75%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ===== SYSTEM DARK MODE FALLBACK ===== */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        --bg-color: #1a1a1a;
        --text-color: #e1e1e1;
        --card-bg: #2d2d2d;
        --border-color: #495057;
        --shadow-light: rgba(255, 255, 255, 0.1);
        --active-line: #e4e4e4;
    }
    
    :root:not([data-theme]) .logo-dark-mode {
        display: block;
    }

    :root:not([data-theme]) .logo-light-mode {
        display: none;
    }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        transition: none !important;
        animation: none !important;
    }
}

*:focus-visible {
    outline: 2px solid #007bff;
    outline-offset: 2px;
    border-radius: 4px;
}

/* ===== UTILITIES ===== */
.mandarin {
    font-family: 'Liu Jian Mao Cao', cursive;
}

.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* Bootstrap 5 compatibility utilities */
.float-start { float: left !important; }
.float-end { float: right !important; }
.ps-1 { padding-left: 0.25rem !important; }
.me-auto { margin-right: auto !important; }