/* === IMPORT FONT === */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&display=swap');

/* === VARIABLES & RESET === */
:root {
    --bg-color: #0b1120;
    --surface-color: #161f32;
    --border-color: #2a3649;
    --primary-color: #38bdf8; /* Neon Blue */
    --primary-hover: #7dd3fc;
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --success: #4ade80;
    --warning: #fbbf24;
    --danger: #ef4444;
    --font-family: 'Inter', system-ui, sans-serif;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
}

* { box-sizing: border-box; margin: 0; padding: 0; outline: none; }

body {
    font-family: var(--font-family);
    background: radial-gradient(circle at top, rgba(56, 189, 248, 0.08), transparent 35%), linear-gradient(180deg, #070b16 0%, #0c162d 100%);
    color: var(--text-main);
    line-height: 1.75;
    padding: 24px 16px 40px;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

.lang-bar {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-bottom: 28px;
}

.lang-btn {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
}

.lang-btn:hover {
    background: rgba(56, 189, 248, 0.1);
    border-color: var(--primary-color);
}

.lang-btn.active {
    background: var(--primary-color);
    color: #0b1120;
    border-color: var(--primary-color);
}

.hidden { display: none !important; }

/* === LAYOUT === */
.container { 
    max-width: 1000px; 
    margin: 0 auto; 
    display: flex; 
    flex-direction: column; 
    gap: 30px; 
}

header {
    text-align: center;
    margin-bottom: 28px;
}

header h1 {
    font-size: clamp(2.6rem, 4vw, 3.4rem);
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -1px;
    margin-bottom: 10px;
}

header p {
    font-size: 1.05rem;
    color: var(--text-muted);
    max-width: 760px;
    margin: 0 auto;
}

.container {
    max-width: 980px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.card {
    background-color: rgba(22, 31, 50, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 22px;
    padding: 34px;
    box-shadow: var(--shadow);
}

h2 {
    font-weight: 700;
    font-size: 1.45rem;
    margin-bottom: 18px;
    color: var(--primary-color);
}

/* === PUBLICITÉ === */
.ad-banner {
    width: 100%;
    min-height: 100px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px dashed var(--border-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 10px 0;
}

/* === INPUT SECTION === */
.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    background-color: rgba(0,0,0,0.1);
}

.drop-zone:hover {
    border-color: var(--primary-color);
    background-color: rgba(56, 189, 248, 0.05);
}

.drop-zone svg { 
    margin-bottom: 15px; 
    opacity: 0.8;
}

.drop-zone h3 { font-size: 1.3rem; margin-bottom: 5px; color: var(--text-main); }
.drop-zone p { color: var(--text-muted); }
.drop-zone strong { color: var(--primary-color); }

textarea {
    width: 100%;
    height: 180px;
    background-color: #080d16;
    color: var(--text-main);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    font-family: inherit;
    font-size: 1rem;
    resize: vertical;
    margin: 25px 0 10px 0;
    transition: border-color 0.2s;
}

textarea:focus {
    border-color: var(--primary-color);
}

.stats-bar {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 25px;
    padding: 0 5px;
}

/* === BOUTONS === */
button {
    background-color: var(--primary-color);
    color: #0b1120;
    border: none;
    border-radius: 14px;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 16px 28px rgba(56, 189, 248, 0.12);
}

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

button:disabled {
    background-color: var(--border-color);
    color: var(--text-muted);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.download-btn {
    width: 100%;
    margin: 20px 0 0;
    padding: 16px 22px;
    border-radius: 16px;
    font-weight: 700;
    letter-spacing: 0.01em;
}

/* === TABS === */
.tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 25px;
    border-bottom: 2px solid rgba(255, 255, 255, 0.08);
    padding-bottom: 12px;
}

.tab-btn {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-muted);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 999px;
    font-size: 0.95rem;
    padding: 10px 20px;
}

.tab-btn.active {
    background: var(--primary-color);
    color: #0b1120;
    border-color: var(--primary-color);
}

.btn-reset {
    margin-left: auto;
    border-color: rgba(239, 68, 68, 0.5);
    color: var(--danger);
}

.btn-reset:hover {
    background: rgba(239, 68, 68, 0.12);
    border-color: var(--danger);
}

/* === VUES SPÉCIFIQUES === */

/* Jeu */
.game-area { text-align: center; padding: 20px 0; }
.target-letter { font-size: 6rem; font-weight: 700; color: var(--primary-color); margin: 10px 0; display: block; text-shadow: 0 0 15px rgba(56, 189, 248, 0.5); }
.input-group { display: flex; justify-content: center; gap: 15px; margin: 30px 0; }
input[type="number"] { background: #080d16; color: white; border: 1px solid var(--border-color); border-radius: 6px; padding: 12px; font-size: 1.2rem; width: 140px; text-align: center; }

/* Graph & Wordcloud */
.chart-controls { display: flex; justify-content: flex-end; margin-bottom: 20px; }
#btn-toggle-sort { margin-bottom: 20px; align-self: flex-end; }
#frequencyChart { max-height: 400px; }
#wordCloudCanvas { 
    width: 100% !important; 
    height: 450px !important; 
    background-color: #080d16; 
    border-radius: 12px; 
    border: 1px solid var(--border-color); 
}

/* Lisibilité (Grid améliorée) */
.readability-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 0 auto 25px;
    max-width: 980px;
}

/* Assurer au moins 3 colonnes sur écrans moyens */
@media (min-width: 768px) {
    .readability-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Sur très grands écrans, permettre plus de colonnes */
@media (min-width: 1200px) {
    .readability-grid {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }
}

.stat-box {
    background: rgba(0,0,0,0.2);
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: transform 0.2s;
}

.stat-box:hover { transform: translateY(-3px); }

.stat-box h3 { font-size: 2.5rem; font-weight: 700; color: var(--primary-color); margin-bottom: 8px; }
.stat-box p { color: var(--text-main); font-size: 1rem; font-weight: 600; margin-bottom: 4px; }
.stat-box span { color: var(--text-muted); font-size: 0.85rem; }

#read-score-box {
    background: rgba(0,0,0,0.2);
    border-color: var(--border-color);
}

#read-score-box.level-easy {
    background: rgba(34, 197, 94, 0.12);
    border-color: #22c55e;
}

#read-score-box.level-medium {
    background: rgba(251, 146, 60, 0.12);
    border-color: #f97316;
}

#read-score-box.level-difficult {
    background: rgba(239, 68, 68, 0.12);
    border-color: #ef4444;
}

#read-score-box.level-academic {
    background: rgba(109, 40, 217, 0.12);
    border-color: #7c3aed;
}

#read-score-box.level-easy h3,
#read-score-box.level-easy p {
    color: #16a34a;
}

#read-score-box.level-medium h3,
#read-score-box.level-medium p {
    color: #ea580c;
}

#read-score-box.level-difficult h3,
#read-score-box.level-difficult p {
    color: #dc2626;
}

#read-score-box.level-academic h3,
#read-score-box.level-academic p {
    color: #7c3aed;
}

#read-level.level-easy,
#read-level.level-medium,
#read-level.level-difficult,
#read-level.level-academic {
    font-weight: 700;
}

#read-level.level-easy { color: #16a34a; }
#read-level.level-medium { color: #ea580c; }
#read-level.level-difficult { color: #dc2626; }
#read-level.level-academic { color: #7c3aed; }

.trust-faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.trust-faq-grid h2 {
    color: var(--text-main);
    margin-bottom: 14px;
}

.trust-faq-grid ul {
    list-style: disc inside;
    color: var(--text-muted);
    line-height: 1.9;
    padding-left: 8px;
}

.trust-faq-grid p {
    color: var(--text-muted);
    line-height: 1.9;
    margin-bottom: 16px;
}

.trust-faq-grid strong {
    color: var(--text-main);
}

.site-footer {
    padding: 34px 0 46px;
    color: var(--text-muted);
}

.site-footer .legal-card {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.08);
    padding: 32px;
}

.site-footer h2 {
    color: var(--text-main);
    font-size: 1.15rem;
    margin-bottom: 12px;
}

.site-footer p {
    line-height: 1.95;
    margin-bottom: 16px;
    color: var(--text-muted);
}

.site-footer .legal-card p:last-child {
    margin-bottom: 0;
}

.advanced-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.advanced-item {
    background: rgba(0,0,0,0.2);
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.advanced-item.full-width {
    grid-column: 1 / -1;
    text-align: left;
}

.advanced-item h3 {
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-bottom: 10px;
    font-weight: 600;
}

.advanced-item p {
    color: var(--text-main);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* === BUTTON FIXES === */
#btn-analyze {
    width: 100%;
    margin: 20px 0 0;
    padding: 16px 22px;
    border-radius: 16px;
    font-weight: 700;
    letter-spacing: 0.01em;
    background: var(--primary-color);
    color: #0b1120;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

#btn-analyze:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 15px -3px rgba(56, 189, 248, 0.3);
}

#btn-analyze:disabled {
    background: var(--border-color);
    color: var(--text-muted);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* === MAIN CONTENT LAYOUT === */
#section-app {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 980px;
    margin: 0 auto;
}

.export-buttons {
    display: flex;
    gap: 12px;
    align-items: center;
}

.export-buttons .download-btn {
    font-size: 0.9rem;
    padding: 8px 16px;
    height: auto;
    line-height: 1.4;
    white-space: nowrap;
}

/* === RESPONSIVE === */