:root {
    /* Light Mode - Tuscan Inspired */
    --bg-color: #fdfaf6;
    --card-bg: #ffffff;
    --text-primary: #3d3b38;
    --text-secondary: #6e6a64;
    --accent-color: #d97743; /* Terracotta */
    --accent-hover: #c46633;
    --olive: #8a9a5b;
    --gold: #e6b325;
    --border-color: #e5dfd5;
    --shadow: 0 10px 25px rgba(0,0,0,0.05);
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

[data-theme="dark"] {
    /* Night Mode */
    --bg-color: #1a1918;
    --card-bg: #262524;
    --text-primary: #f0ebe1;
    --text-secondary: #b3aea6;
    --accent-color: #e08b5c; 
    --accent-hover: #f2a67e;
    --olive: #9db066;
    --border-color: #3d3b38;
    --shadow: 0 10px 25px rgba(0,0,0,0.3);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    transition: var(--transition);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Views */
.view {
    display: none;
    opacity: 0;
    transition: opacity 0.5s ease;
}
.view.active {
    display: block;
    opacity: 1;
}

/* Login Card */
#login-view {
    height: 100vh;
    justify-content: center;
    align-items: center;
}
#login-view.active {
    display: flex;
}

.login-card {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    max-width: 400px;
    width: 90%;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.login-card h1 {
    color: var(--accent-color);
    margin-bottom: 0.5rem;
    font-size: 2.5rem;
}

.login-card p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.input-group {
    margin-bottom: 1rem;
}

.input-group input {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: transparent;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
}

.input-group input:focus {
    border-color: var(--accent-color);
}

button {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    transition: var(--transition);
}

button:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

.error-msg {
    color: #e74c3c;
    margin-top: 1rem;
    font-size: 0.9rem;
    min-height: 1.2rem;
}

/* Dashboard Header */
header {
    background: var(--card-bg);
    padding: 1.5rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow);
    border-bottom: 1px solid var(--border-color);
}

header h2 {
    color: var(--accent-color);
    font-weight: 600;
}

.site-menu {
    position: relative;
}

.menu-button {
    width: auto;
    padding: 0.7rem 1rem;
    background: var(--olive);
    font-size: 0.95rem;
}

.menu-button:hover {
    background: #7a8a4b;
}

.menu-panel {
    display: none;
    position: absolute;
    top: calc(100% + 0.6rem);
    right: 0;
    min-width: 220px;
    padding: 0.5rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
    z-index: 10;
}

.site-menu.open .menu-panel {
    display: grid;
    gap: 0.25rem;
}

.menu-panel a {
    padding: 0.75rem 0.85rem;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
}

.menu-panel a:hover,
.menu-panel a[aria-current="page"] {
    color: var(--accent-color);
    background: rgba(217, 119, 67, 0.08);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.badge {
    background: var(--olive);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.icon-btn {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    width: 40px;
    height: 40px;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
}
.icon-btn:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

/* Dashboard Content */
main {
    padding: 3rem 5%;
    max-width: 900px; /* narrowed for lesson layout readability */
    margin: 0 auto;
    width: 100%;
}

.content-page main {
    max-width: 1040px;
}

.section-title {
    margin-bottom: 1.5rem;
    font-size: 1.6rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
    color: var(--text-primary);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.card:hover {
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}

/* Interactive Exercise Cards */
.exercise-card {
    cursor: pointer;
    position: relative;
    overflow: hidden;
    min-height: 200px;
}

.exercise-card .ex-back {
    display: none;
    height: 100%;
}

.exercise-card.revealed .ex-front {
    display: none;
}
.exercise-card.revealed .ex-back {
    display: block;
    animation: fadeIn 0.4s ease forwards;
}

.exercise-card h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.click-hint {
    margin-top: 1.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-color);
    text-align: center;
}

.old-way {
    color: #e74c3c;
    font-size: 1.2rem;
    font-weight: 500;
}

.new-way {
    color: var(--olive);
    font-weight: 600;
    font-size: 1.4rem;
    background: rgba(138, 154, 91, 0.1);
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    margin-top: 1rem;
}

/* Buttons and Links */
.play-btn {
    background-color: var(--olive);
    width: auto;
    padding: 0.8rem 1.5rem;
}
.play-btn:hover {
    background-color: #7a8a4b;
}

.download-link {
    display: inline-block;
    padding: 1rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}
.download-link:hover {
    border-color: var(--accent-color);
    background: rgba(217, 119, 67, 0.05);
}

.next-page-card {
    margin-top: 1rem;
}

.next-page-card p {
    margin: 0.5rem 0 1rem;
    color: var(--text-secondary);
}

.page-hero {
    padding: 1rem 0 2.5rem;
}

.page-hero h1 {
    color: var(--accent-color);
    font-size: 3rem;
    line-height: 1.05;
    margin: 0.35rem 0 0.75rem;
}

.page-hero p {
    max-width: 720px;
    color: var(--text-secondary);
    font-size: 1.15rem;
    line-height: 1.6;
}

.page-hero .focus-statement {
    color: var(--text-primary);
    padding: 1rem 1.15rem;
    border-left: 4px solid var(--olive);
    border-radius: 8px;
    background: rgba(138, 154, 91, 0.1);
    margin-bottom: 1rem;
}

.kicker {
    color: var(--olive);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0;
}

.content-section {
    padding: 2.25rem 0;
    border-top: 1px solid var(--border-color);
}

.review-order {
    margin-bottom: 2.25rem;
}

.review-order h2 {
    color: var(--accent-color);
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.review-order ol {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 0.65rem;
    list-style-position: inside;
}

.review-order li {
    padding: 0.8rem;
    border-radius: 8px;
    background: var(--bg-color);
    line-height: 1.4;
}

.content-section h2 {
    color: var(--text-primary);
    font-size: 1.65rem;
    margin-bottom: 1.25rem;
}

.content-section h3 {
    color: var(--accent-color);
    font-size: 1.05rem;
    margin-bottom: 0.85rem;
}

.content-section p,
.content-section li,
.lesson-table {
    line-height: 1.6;
}

.content-section ul {
    padding-left: 1.2rem;
}

.phrase-grid,
.split-layout,
.exercise-columns,
.ladder {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
}

.phrase-card,
.pattern-box,
.exercise-columns article,
.ladder article,
.examples article {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.25rem;
    box-shadow: var(--shadow);
}

.feature-section {
    padding: 2.5rem 0;
}

.feature-section .table-wrap {
    box-shadow: var(--shadow);
}

.default-callout,
.warning-callout {
    margin-top: 1.25rem;
    padding: 1rem 1.15rem;
    border-left: 4px solid var(--olive);
    background: rgba(138, 154, 91, 0.1);
    border-radius: 8px;
}

.warning-callout {
    border-left-color: var(--accent-color);
    background: rgba(217, 119, 67, 0.09);
}

.example-pair {
    margin-top: 1rem;
    display: grid;
    gap: 0.5rem;
}

.example-pair p,
.mini-formula {
    padding: 0.75rem;
    border-radius: 8px;
    background: var(--bg-color);
}

.example-pair span {
    color: var(--olive);
    font-weight: 600;
}

.pattern-box,
.formula-card {
    margin-top: 1rem;
}

.table-wrap {
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}

.lesson-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 560px;
    background: var(--card-bg);
}

.lesson-table th,
.lesson-table td {
    padding: 0.9rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.lesson-table th {
    color: var(--accent-color);
    background: rgba(217, 119, 67, 0.08);
}

.tense-map td:nth-child(2) {
    color: var(--olive);
}

.lesson-table tr:last-child td {
    border-bottom: none;
}

.formula-card {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
    padding: 1rem;
    border-radius: var(--border-radius);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.formula-card span {
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    background: rgba(138, 154, 91, 0.12);
    font-weight: 600;
}

.example-list,
.quick-questions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    margin: 1rem 0;
}

.example-list p,
.quick-questions span {
    padding: 0.65rem 0.85rem;
    border-radius: 8px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.examples {
    margin-top: 1rem;
}

.comparison-table {
    margin-top: 1rem;
}

.practice-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.practice-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 1rem;
}

.practice-card summary {
    cursor: pointer;
    color: var(--text-primary);
    font-weight: 600;
    line-height: 1.5;
}

.practice-card summary::marker {
    color: var(--accent-color);
}

.practice-card p {
    margin-top: 0.85rem;
    padding: 0.85rem;
    border-radius: 8px;
    background: rgba(138, 154, 91, 0.1);
}

.exercise-columns article p {
    margin-bottom: 0.5rem;
}

.correction-table td:first-child {
    color: #b84638;
}

/* Admin Elements */
.admin-badge { background: var(--gold); }
.admin-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.admin-btn {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    width: auto;
}

/* Animations */
.bounce-in {
    animation: bounceIn 0.8s cubic-bezier(0.25, 0.8, 0.25, 1);
}

@keyframes bounceIn {
    0% { transform: scale(0.8); opacity: 0; }
    50% { transform: scale(1.05); opacity: 1; }
    100% { transform: scale(1); }
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 720px) {
    header {
        align-items: flex-start;
        flex-direction: column;
    }

    .header-controls {
        width: 100%;
        justify-content: flex-start;
    }

    .menu-panel {
        left: 0;
        right: auto;
        width: min(86vw, 280px);
    }

    main {
        padding: 2rem 5%;
    }

    .page-hero h1 {
        font-size: 2.35rem;
    }
}