:root {
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --accent: #d97706;
    /* Amber-600 */
    --accent-hover: #b45309;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Dark Theme - applied via media query OR data attribute override */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme-override="light"]) {
        --bg-color: #0f172a;
        --card-bg: #1e293b;
        --text-primary: #f1f5f9;
        --text-secondary: #94a3b8;
        --accent: #fbbf24;
        /* Amber-400 */
        --accent-hover: #f59e0b;
        --border: #334155;
        --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.5);
    }
}

:root[data-theme-override="dark"] {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent: #fbbf24;
    /* Amber-400 */
    --accent-hover: #f59e0b;
    --border: #334155;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.5);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-y: scroll;
    /* Prevent layout shift */
}

/* --- Layout --- */

nav,
footer {
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: center;
    /* Center nav items */
    gap: 1.5rem;
    font-size: 0.9em;
}

nav a,
footer a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
    font-weight: 500;
}

nav a:hover,
footer a:hover,
nav a.active,
footer a.active {
    color: var(--accent);
}

.theme-select {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    border-radius: 4px;
    padding: 0.2rem 0.5rem;
    font-size: 0.85rem;
    cursor: pointer;
    font-family: inherit;
}

.theme-select:focus {
    outline: none;
    border-color: var(--accent);
}

main {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1.5rem;
}

/* --- Components --- */

/* Card */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2.5rem;
    box-shadow: var(--shadow);
    max-width: 600px;
    width: 100%;
    text-align: center;
    position: relative;
    transition: transform 0.2s ease;
}

/* Typography */

.site-title {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-weight: 600;
}

/* Logo */
.logo {
    height: 32px;
    width: auto;
    display: block;
    margin: 0 auto 2rem;
    color: var(--text-primary);
    /* For SVG currentColor */
}

/* Theme Toggle Slider */
.theme-toggle {
    display: flex;
    background: var(--border);
    /* darker bg for track */
    padding: 3px;
    border-radius: 99px;
    gap: 2px;
}

.theme-opt {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.25rem 0.6rem;
    border-radius: 99px;
    cursor: pointer;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    min-width: 32px;
}

.theme-opt svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
}

.theme-opt:hover {
    color: var(--text-primary);
}

.theme-opt.active {
    background: var(--card-bg);
    color: var(--accent);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* Hide old select */
.theme-select {
    display: none;
}

.daily-text {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    min-height: 3.5rem;
    /* reduce layout shift */
}

.daily-reflection {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 2rem;
    min-height: 1.5rem;
}

.meta-row {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border);
    padding-top: 1.5rem;
    margin-bottom: 1.5rem;
}

/* Buttons */
.btn-group {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

button {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    font-family: inherit;
    transition: all 0.2s ease;
}

button:hover:not(:disabled) {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(var(--accent), 0.05);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--bg-color);
}

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

button.primary:hover {
    background: var(--accent-hover);
    color: white;
    /* Keep white on hover */
}

/* Utilities */
.hidden {
    display: none !important;
}

.error {
    color: #ef4444;
}

.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-primary);
    color: var(--bg-color);
    padding: 0.75rem 1.5rem;
    border-radius: 99px;
    font-size: 0.9rem;
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 100;
    box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Archive Page */
.archive-container {
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
}

.search-bar {
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.search-input {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--card-bg);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
}

.search-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(251, 191, 36, 0.2);
}

.tag-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag-chip {
    font-size: 0.8rem;
    padding: 0.3rem 0.8rem;
    border-radius: 99px;
    border: 1px solid var(--border);
    background: var(--card-bg);
}

.tag-chip.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.archive-grid {
    display: grid;
    gap: 1.5rem;
}

.archive-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
}

.archive-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.mini-tag {
    margin-left: 0.5rem;
    color: var(--accent);
}

.archive-text {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.archive-reflection {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* Mobile Tweak */
@media (max-width: 600px) {
    .card {
        padding: 1.5rem;
    }

    .daily-text {
        font-size: 1.4rem;
    }

    .meta-row {
        flex-direction: column;
        gap: 0.5rem;
    }
}