:root {
    --bg: #0d1117; --card: #161b22;
    --accent-primary: #f67280; --accent-secondary: #f8b196;
    --accent-muted: #c06c84; --accent-dark: #355c7d;
    --text-main: #f4e8e1; --text-muted: #8b949e;
    
    /* Unified Border Radius Scale */
    --radius-sm: 12px;   /* Buttons, small badges */
    --radius-md: 18px;      /* Inputs, dropdowns, standard components */
    --radius: 24px;  /* Cards, list items, modals */
    --radius-lg: 36px;  /* Hero cards, stat boxes, large sections */
    --radius-xl: 50px;  /* Pill navigation, tags */

    /* Semantic Status Colors */
    --status-error: #ff4d4d;
    --status-success: #00ff7f;
    --status-warning: #ffd700;
    
    /* Unified Spacing Scale */
    --space-1: 4px;   /* Micro spacing */
    --space-2: 8px;   /* Small gaps */
    --space-3: 10px;  /* Small padding */
    --space-4: 15px;  /* Standard padding */
    --space-5: 20px;  /* Medium gaps */
    --space-6: 25px;  /* Large padding */
    --space-7: 30px;  /* Large gaps */
    --space-8: 40px;  /* Extra large gaps */
    --space-9: 50px;  /* Section spacing */
    --space-10: 60px; /* Hero spacing */
    
    color-scheme: dark light;
}

body {
    background-color: var(--bg); color: var(--text-main);
    font-family: 'Inter', system-ui, sans-serif; margin: 0; padding: 20px;
    background-image: radial-gradient(circle at top right, var(--accent-dark), var(--bg));
    min-height: 100vh;
}
/* Toast Notification System */
#toast-container {
    position: fixed; top: 20px; left: 50%; transform: translateX(-50%);
    z-index: 9999; display: flex; flex-direction: column; gap: 10px;
}
.toast {
    background: var(--card); border: 1px solid var(--accent-primary);
    color: white; padding: 15px 25px; border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5); font-weight: 800; font-size: 0.9rem;
    opacity: 0; transform: translateY(-20px); transition: all 0.3s ease;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.error { border-color: var(--status-error); color: var(--status-error); }
.container { max-width: 1300px; margin: 0 auto; }

/* --- Navigation Bar --- */
.main-nav {
    display: flex; justify-content: space-between; align-items: center;
    background: rgba(22, 27, 34, 0.65); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    padding: 12px 20px; border-radius: 12px; margin-bottom: 40px;
    border: 1px solid rgba(255,255,255,0.08); box-shadow: 0 8px 32px rgba(0,0,0,0.3); flex-wrap: nowrap;
    position: relative; z-index: 4000;
}

.mobile-nav-toggle { display: none; }
.nav-links { display: flex; gap: 10px; align-items: center; flex-shrink: 0; }
.nav-links a, .search-mobile-btn {
    color: var(--text-main); text-decoration: none; font-weight: 700;
    opacity: 0.7; transition: 0.2s ease; font-size: 0.85rem; background: transparent;
    border: 1px solid transparent; cursor: pointer; padding: 0 12px; font-family: inherit;
    border-radius: 8px; height: 36px; box-sizing: border-box; display: inline-flex; align-items: center; justify-content: center;
}
.nav-links a:hover, .search-mobile-btn:hover { opacity: 1; background: rgba(255,255,255,0.05); }
.nav-links a.active { opacity: 1; background: var(--accent-dark); color: #fff; border-color: rgba(255,255,255,0.1); }

.nav-search { position: relative; margin: 0 15px; flex-grow: 1; max-width: 250px; display: block; }
#navSearchInput {
    background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1);
    color: white; padding: 0 15px; border-radius: 8px; font-size: 0.85rem;
    width: 100%; height: 36px; box-sizing: border-box; transition: 0.3s; outline: none;
}
#navSearchInput:focus { border-color: var(--accent-primary); background: rgba(0,0,0,0.2); }

.search-results-dropdown {
    position: absolute; top: 120%; left: 0; width: 320px;
    background: var(--card); border: 1px solid rgba(255,255,255,0.1);
    border-radius: 12px; display: none; z-index: 3000;
    max-height: 320px; overflow-y: auto;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.search-item {
    display: flex; align-items: center; gap: 12px; padding: 10px;
    cursor: pointer; border-bottom: 1px solid rgba(255,255,255,0.05);
    text-decoration: none; color: inherit; transition: background 0.2s;
}
.search-item:hover { background: rgba(255,255,255,0.05); }
.search-item-img { width: 40px; height: 55px; object-fit: cover; border-radius: 4px; flex-shrink: 0; }
.search-info { flex: 1; min-width: 0; }
.search-item-title { font-weight: 800; display: block; font-size: 0.9rem; color: var(--text-main); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.search-item-year { font-size: 0.7rem; color: var(--text-muted); }

/* Standardized Button Styles for Unified Modal System */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    box-sizing: border-box;
    height: 42px;
}

.btn-primary {
    background: var(--accent-primary);
    color: white;
}

.btn-primary:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-main);
}

.global-filter { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.filter-go {
    background: var(--accent-primary); border: none; color: white;
    padding: 0 16px; border-radius: 8px; font-weight: 800; cursor: pointer; font-size: 0.85rem; line-height: 1;
    height: 36px; display: inline-flex; align-items: center; justify-content: center; transition: 0.2s ease; box-sizing: border-box;
}
.filter-go:hover { filter: brightness(1.1); transform: translateY(-1px); }

/* Range Picker Styles */
.range-picker { position: relative; }
.range-dropdown {
    position: absolute; top: 120%; right: 0; width: 140px;
    background: var(--card); border: 1px solid rgba(255,255,255,0.1);
    border-radius: 12px; display: none; z-index: 3000;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    overflow: hidden;
}
.range-option {
    padding: 10px 15px; cursor: pointer; font-size: 0.8rem; color: var(--text-main);
    border-bottom: 1px solid rgba(255,255,255,0.05); transition: 0.2s;
}
.range-option:hover { background: var(--accent-dark); }
.range-option:last-child { border-bottom: none; }

.search-mobile-btn { display: none; }

@media (max-width: 1300px) {
    .main-nav { flex-direction: column; border-radius: var(--radius); padding: 15px; gap: 15px; margin-bottom: 20px; }
    .nav-links { width: 100%; justify-content: center; flex-wrap: wrap; gap: 15px; }
    .nav-search { display: none; }
    .search-mobile-btn { display: inline-block; }
    .global-filter { width: 100%; justify-content: center; flex-wrap: wrap; }
}

@media (max-width: 750px) {
    .main-nav { align-items: stretch; padding: 15px; gap: 0; }
    .mobile-nav-toggle {
        display: block; background: transparent; border: 1px solid rgba(255,255,255,0.1);
        color: var(--text-muted); font-size: 0.9rem; padding: 10px; border-radius: 12px;
        cursor: pointer; text-align: center; font-weight: 800; text-transform: uppercase;
        letter-spacing: 1px; width: 100%; transition: 0.2s;
    }
    .mobile-nav-toggle:hover { background: rgba(255,255,255,0.05); color: var(--text-main); }
    
    .nav-links { display: none; flex-direction: column; width: 100%; margin-top: 15px; gap: 8px; }
    .main-nav.expanded .nav-links { display: flex; }
    
    .nav-links a, .search-mobile-btn {
        width: 100%; text-align: center;
        background: rgba(255,255,255,0.03);
    }
    .nav-links a.active { background: var(--accent-dark); color: #fff; }
    .active-session-cover {
        width: 45px; height: 60px; object-fit: cover; border-radius: 12px;
        box-shadow: 0 4px 10px rgba(0,0,0,0.3); flex-shrink: 0;
    }
    /* Hide elements by default, show in expanded nav */
    .nav-search { display: none; }
    .global-filter { display: none; }
    .main-nav.expanded .global-filter {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
        margin-top: 20px;
        padding-top: 15px;
        border-top: 1px solid rgba(255,255,255,0.1);
    }
}

.form-input {
    width: 100%; padding: 12px; background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1); border-radius: 12px;
    color: var(--text-main); margin-top: 8px; box-sizing: border-box; font-family: inherit;
}
.label-text { font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; margin-top: 15px; display: block; }

/* --- Settings Layouts --- */
.theme-editor-layout {
    display: flex; flex-direction: row; gap: 30px; align-items: flex-start; margin-top: 20px;
}
.theme-selector-side { flex: 0 0 220px; }
.theme-palette-side { flex: 1; width: 100%; min-width: 0; box-sizing: border-box; }
.theme-palette-box {
    padding: 20px; background: var(--bg); border-radius: 12px; border: 1px solid rgba(255,255,255,0.05);
}

@media (max-width: 1100px) {
    .theme-editor-layout { flex-direction: column; gap: 15px; }
    .theme-selector-side { width: 100%; margin-bottom: 0; flex: auto; }
    .theme-palette-side { width: 100%; }
    .theme-palette-box { padding: 15px; }
}

/* Color Picker Styling */
input[type="color"].form-input {
    padding: 4px; height: 45px; cursor: pointer; background: var(--card);
}
input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}
input[type="color"]::-webkit-color-swatch {
    border: 1px solid rgba(255,255,255,0.1); border-radius: 12px;
}
input[type="color"]::-moz-color-swatch {
    border: 1px solid rgba(255,255,255,0.1); border-radius: 12px;
}

/* --- UNIFIED UI ANIMATIONS --- */
.ui-dropdown {
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1), transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.2s;
    display: block !important;
}
.ui-dropdown.open, .ui-dropdown.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.ui-collapse {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.ui-collapse-inner {
    overflow: hidden;
    opacity: 0;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.ui-collapse.open { grid-template-rows: 1fr; }
.ui-collapse.open > .ui-collapse-inner { opacity: 1; }

/* --- UTILITIES --- */
.d-none { display: none !important; }
.status-success { color: var(--status-success); }
.status-error   { color: var(--status-error); }

/* --- NAV DATE COMPONENTS --- */
.nav-range-btn { background: var(--card); border: 1px solid rgba(255,255,255,0.1); display: flex; align-items: center; gap: 6px; height: 36px; padding: 0 12px; border-radius: 8px; color: var(--text-main); cursor: pointer; transition: 0.2s; font-size: 0.85rem; font-weight: 800; }
.nav-range-btn:hover { background: rgba(255,255,255,0.05); }
.nav-dropdown-arrow { font-size: 0.7rem; opacity: 0.7; }
.nav-date-input { background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); color: white; padding: 0 12px; border-radius: 8px; font-size: 0.85rem; height: 36px; box-sizing: border-box; outline: none; transition: 0.3s; }
.nav-date-input:focus { border-color: var(--accent-primary); background: rgba(0,0,0,0.2); }
.nav-date-separator { font-size: 0.85rem; color: var(--text-muted); margin: 0 4px; }
.nav-reset-link { color: var(--text-muted); font-size: 0.75rem; text-decoration: none; margin-left: 5px; padding: 4px 8px; border-radius: 6px; transition: 0.2s; }
.nav-reset-link:hover { background: rgba(255,255,255,0.05); color: var(--text-main); }

/* --- GLOBAL SYSTEM BANNER --- */
#global-banner-container { margin-bottom: 20px; }
.global-banner {
    background: rgba(53, 92, 125, 0.2);
    border: 1px solid var(--accent-dark);
    border-radius: var(--radius);
    padding: 12px 20px;
    display: flex; justify-content: space-between; align-items: center; gap: 20px;
    animation: slide-down 0.3s ease;
}
.banner-content { display: flex; align-items: center; gap: 10px; color: var(--text-main); font-size: 0.85rem; line-height: 1.4; }
.banner-icon { font-size: 1.2rem; }
.banner-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.banner-action-btn { background: var(--accent-dark); color: white; border: none; padding: 6px 12px; border-radius: 6px; cursor: pointer; font-size: 0.75rem; font-weight: bold; transition: 0.2s; }
.banner-action-btn:hover { filter: brightness(1.2); }
.banner-close-btn { background: transparent; color: var(--text-muted); border: none; font-size: 1.2rem; cursor: pointer; padding: 0; line-height: 1; transition: 0.2s; }
.banner-close-btn:hover { color: white; }
.banner-content code { background: rgba(0,0,0,0.3); padding: 2px 6px; border-radius: 4px; color: var(--accent-secondary); }

@keyframes slide-down { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }

@media (max-width: 750px) {
    .global-banner { flex-direction: column; align-items: stretch; }
    .banner-actions { justify-content: flex-end; }
}