/* Custom CSS Architecture & Theme Tokens */
@import url('https://fonts.googleapis.com/css2?family=Newsreader:ital,opsz,wght@0,6..72,300..700;1,6..72,300..700&family=Plus+Jakarta+Sans:wght@300;400;500;600;700&family=Fira+Code:wght@400;500&display=swap');

:root {
    /* Academic Parchment Light Mode (Default) */
    --bg-primary: #FBF9F5;
    --bg-secondary: #F4F0E8;
    --bg-tertiary: #EAE5D9;
    --border-color: #E6E2D6;
    --border-accent: #CFC9BA;
    --text-primary: #1C2421;
    --text-secondary: #4A5550;
    --text-muted: #718077;
    --accent-emerald: #1C2421;
    --accent-hover: #2D3A35;
    --gold-accent: #D4AF37;
    --badge-bg: #EAE5D9;
    --badge-text: #2D3A35;
    --card-shadow: 0 4px 20px -2px rgba(28, 36, 33, 0.05);
    --glass-bg: rgba(251, 249, 245, 0.85);
    --modal-overlay: rgba(28, 36, 33, 0.6);
}

[data-theme="dark"] {
    /* Deep Obsidian & Emerald Dark Mode */
    --bg-primary: #0D1311;
    --bg-secondary: #141C19;
    --bg-tertiary: #1D2824;
    --border-color: #273631;
    --border-accent: #3A4E47;
    --text-primary: #F4F7F5;
    --text-secondary: #A0B2AA;
    --text-muted: #6B7F76;
    --accent-emerald: #3B8266;
    --accent-hover: #4CA582;
    --gold-accent: #E5C158;
    --badge-bg: #23322C;
    --badge-text: #8AE6C1;
    --card-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
    --glass-bg: rgba(13, 19, 17, 0.85);
    --modal-overlay: rgba(5, 8, 7, 0.8);
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Plus Jakarta Sans', sans-serif;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

.font-serif-custom {
    font-family: 'Newsreader', serif;
}

.font-mono-custom {
    font-family: 'Fira Code', monospace;
}

/* Glassmorphism Header & Modals */
.glass-header {
    background-color: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--border-accent);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Micro Animations & Hover Effects */
.card-hover {
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), 
                box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1), 
                border-color 0.25s ease;
}

.card-hover:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow);
    border-color: var(--border-accent);
}

.btn-primary {
    background-color: var(--accent-emerald);
    color: var(--bg-primary);
    transition: all 0.2s ease;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-outline {
    border: 1px solid var(--border-accent);
    color: var(--text-primary);
    background-color: transparent;
    transition: all 0.2s ease;
}

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

/* Star / Applaud Button Pulse */
@keyframes pulse-subtle {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}

.pulse-active {
    animation: pulse-subtle 0.3s ease-in-out;
}

/* Toast Notifications */
#toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 100;
    display: flex;
    flex-col-gap: 0.75rem;
    pointer-events: none;
}

.toast {
    pointer-events: auto;
    min-width: 280px;
    max-width: 380px;
    padding: 1rem 1.25rem;
    border-radius: 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-accent);
    color: var(--text-primary);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    display: flex;
    items-center: center;
    gap: 0.75rem;
    animation: slideInRight 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Filter Tag Pills */
.filter-pill {
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    font-size: 0.8125rem;
    font-weight: 5rem;
    cursor: pointer;
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.filter-pill.active {
    background-color: var(--accent-emerald);
    color: var(--bg-primary);
    border-color: var(--accent-emerald);
}

/* Modal Window Base */
.modal-backdrop {
    background-color: var(--modal-overlay);
    backdrop-filter: blur(4px);
}