:root {
    /* --- CONFIGURATION DESIGN SYSTEM MATERIAL 3 --- */
    --md-sys-color-primary: #2b6a4a;            
    --md-sys-color-on-primary: #ffffff;
    --md-sys-color-primary-container: #d2f5e0;  
    --md-sys-color-on-primary-container: #062113;
    
    --md-sys-color-surface: #fbfdf9;            
    --md-sys-color-surface-container: #edf1ee;  
    --md-sys-color-surface-container-high: #e1e6e3; 
    --md-sys-color-surface-card: #ffffff;
    
    --md-sys-color-on-surface: #191c1a;
    --md-sys-color-on-surface-variant: #404943;
    --md-sys-color-outline: #707973;
    --md-sys-color-outline-variant: #bfc9c2;
    
    --md-sys-color-error: #ba1a1a;
    --md-sys-color-success: #2b6a4a;

    --radius-large: 24px;
    --radius-medium: 16px;
    --radius-small: 12px;
    --radius-pill: 100px;
    
    --md-shadow-1: 0px 1px 3px rgba(0, 0, 0, 0.05);
    --md-shadow-2: 0px 6px 16px rgba(25, 28, 26, 0.06);
    --md-shadow-3: 0px 12px 32px rgba(25, 28, 26, 0.08);

    --md-easing: cubic-bezier(0.2, 0, 0, 1);
    --md-transition: 0.28s var(--md-easing);
}

* { 
    box-sizing: border-box; 
    -webkit-tap-highlight-color: transparent;
}

body, html {
    margin: 0; padding: 0; height: 100vh;
    font-family: 'Plus Jakarta Sans', sans-serif;
    background-color: var(--md-sys-color-surface);
    color: var(--md-sys-color-on-surface);
    overflow: hidden;
    letter-spacing: -0.2px;
}

#map { width: 100%; height: 100%; }

/* --- MICRO-INTERACTIONS & ANIMATIONS GENÉRALES --- */
.md-button, .recom-card, .choice-chip span, .icon-button, .md-tile {
    transition: transform 0.1s ease, background-color var(--md-transition), border-color var(--md-transition);
}
.md-button:active, .recom-card:active, .icon-button:active, .md-tile:active {
    transform: scale(0.97); /* Effet physique d'enfoncement au clic */
}

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

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

/* --- OVERLAY DE CONFIGURATION (PREFERENCES/LANDING) --- */
#landing-page {
    position: absolute; inset: 0;
    background: rgba(243, 247, 244, 0.82);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    z-index: 100; display: flex; align-items: center; justify-content: center;
    transition: opacity 0.35s var(--md-easing), visibility 0.35s;
}
#landing-page.hidden { opacity: 0; visibility: hidden; pointer-events: none; }

.landing-content {
    background: var(--md-sys-color-surface-card);
    padding: 36px; border-radius: var(--radius-large);
    box-shadow: var(--md-shadow-3);
    max-width: 480px; width: 92%;
    border: 1px solid var(--md-sys-color-outline-variant);
    animation: fadeInCard 0.4s var(--md-easing);
}
.landing-brand { display: flex; align-items: center; justify-content: center; gap: 10px; margin-bottom: 8px; }
.brand-icon { color: var(--md-sys-color-primary); font-size: 32px; }
.landing-title { color: var(--md-sys-color-on-surface); margin: 0; font-size: 26px; font-weight: 700; }
.landing-subtitle { color: var(--md-sys-color-on-surface-variant); text-align: center; margin: 0 0 28px 0; font-size: 14px; line-height: 1.5; }

/* Recherche épurée */
.search-container { position: relative; margin-bottom: 24px; }
.search-container input {
    width: 100%; padding: 16px 16px 16px 52px;
    background-color: var(--md-sys-color-surface-container);
    border: 1px solid transparent; border-radius: var(--radius-pill);
    font-size: 15px; font-family: inherit; color: var(--md-sys-color-on-surface);
    outline: none; transition: var(--md-transition);
}
.search-container input:focus { 
    background-color: var(--md-sys-color-surface-card);
    border-color: var(--md-sys-color-primary); 
    box-shadow: 0 0 0 4px var(--md-sys-color-primary-container);
}
.search-icon { position: absolute; left: 20px; top: 50%; transform: translateY(-50%); color: var(--md-sys-color-on-surface-variant); }

#search-results {
    position: absolute; top: calc(100% + 8px); left: 0; right: 0; 
    background: var(--md-sys-color-surface-card); border-radius: var(--radius-medium);
    box-shadow: var(--md-shadow-2); padding: 0; list-style: none;
    max-height: 180px; overflow-y: auto; z-index: 101; border: 1px solid var(--md-sys-color-outline-variant);
}
#search-results:not(:empty) { padding: 6px 0; }
#search-results li { padding: 12px 20px; cursor: pointer; font-size: 14px; font-weight: 500; }
#search-results li:hover { background-color: var(--md-sys-color-surface-container); }

/* Box Preferences */
.preferences-box { display: flex; flex-direction: column; gap: 20px; text-align: left; margin-bottom: 28px; }
.prefs-title { margin: 0; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; color: var(--md-sys-color-outline); }
.pref-group { display: flex; flex-direction: column; gap: 8px; }
.pref-label { font-size: 13px; font-weight: 600; color: var(--md-sys-color-on-surface-variant); }

/* CONTRÔLE SEGMENTÉ PREMIUM (BOUTONS DANS SLIDER) */
.md-segmented-control {
    display: flex; background-color: var(--md-sys-color-surface-container);
    border-radius: var(--radius-pill); padding: 4px; 
    border: 1px solid rgba(0,0,0,0.04); position: relative;
}
.md-segmented-control input { display: none; }
.md-segmented-control label {
    flex: 1; padding: 10px 12px; border-radius: var(--radius-pill); cursor: pointer;
    font-size: 13px; font-weight: 600; color: var(--md-sys-color-on-surface-variant);
    display: flex; align-items: center; justify-content: center; gap: 6px;
    transition: var(--md-transition); text-align: center;
}
.md-segmented-control label span { font-size: 18px; }
.md-segmented-control input:checked + label {
    background-color: var(--md-sys-color-surface-card); 
    color: var(--md-sys-color-primary);
    box-shadow: var(--md-shadow-1);
}

.md-select {
    width: 100%; padding: 12px 16px; border-radius: var(--radius-small);
    border: 1px solid var(--md-sys-color-outline-variant); background: var(--md-sys-color-surface-card);
    color: var(--md-sys-color-on-surface); font-family: inherit; font-size: 14px;
    outline: none; cursor: pointer; appearance: none;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='%23404943'><path d='M7 10l5 5 5-5z'/></svg>");
    background-repeat: no-repeat; background-position: right 12px center;
}

/* --- VERITABLES SWITCHES CONFORMES MATERIAL 3 --- */
.md-switch {
    position: relative; width: 52px; height: 32px; display: inline-block; cursor: pointer;
}
.md-switch input { opacity: 0; width: 0; height: 0; }
.md-switch-track {
    position: absolute; inset: 0; background-color: var(--md-sys-color-surface-container-high);
    border: 2px solid var(--md-sys-color-outline); border-radius: var(--radius-pill);
    transition: var(--md-transition);
}
.md-switch-thumb {
    position: absolute; top: 6px; left: 6px; width: 16px; height: 16px;
    background-color: var(--md-sys-color-outline); border-radius: 50%;
    transition: var(--md-transition);
}
/* États activés (Changement de piste et bulle qui grandit/se déplace) */
.md-switch input:checked + .md-switch-track {
    background-color: var(--md-sys-color-primary); border-color: transparent;
}
.md-switch input:checked + .md-switch-track .md-switch-thumb {
    transform: translateX(20px); width: 24px; height: 24px;
    top: 2px; left: 2px; background-color: var(--md-sys-color-on-primary);
}

/* --- CONTROLES DE CARTE --- */
#top-controls {
    position: absolute; top: 24px; right: 24px;
    display: flex; flex-direction: column; gap: 12px; align-items: flex-end; z-index: 10;
}
.md-switch-card {
    background-color: var(--md-sys-color-surface-card); border-radius: var(--radius-medium);
    box-shadow: var(--md-shadow-2); padding: 14px 18px; 
    display: flex; flex-direction: column; gap: 14px; min-width: 170px;
    border: 1px solid var(--md-sys-color-outline-variant);
}
.switch-row { display: flex; justify-content: space-between; align-items: center; font-size: 13.5px; font-weight: 600; color: var(--md-sys-color-on-surface-variant); }

/* Bouton déclencheur Preference M3 */
.setup-trigger {
    background-color: var(--md-sys-color-surface-card); width: 48px; height: 48px;
    box-shadow: var(--md-shadow-2); border: 1px solid var(--md-sys-color-outline-variant);
}

/* --- PANNEAUX SIDEBARS & SECTIONS (PRO FLAT) --- */
#sidebar, #recoms-panel {
    position: absolute; top: 0; left: 0; width: 380px; height: 100vh;
    background-color: var(--md-sys-color-surface); z-index: 30; 
    display: flex; flex-direction: column; transform: translateX(-100%); 
    transition: transform 0.4s var(--md-easing);
    border-right: 1px solid var(--md-sys-color-outline-variant);
}
#sidebar:not(.hidden) { animation: slideInPanel 0.4s var(--md-easing); transform: translateX(0); }
#recoms-panel.visible { animation: slideInPanel 0.4s var(--md-easing); transform: translateX(0); }

.sidebar-header { padding: 24px 20px 16px 20px; display: flex; justify-content: space-between; align-items: center; }
.header-title-group { display: flex; align-items: center; gap: 8px; }
.header-icon { font-size: 22px; color: var(--md-sys-color-primary); }
.md-title { margin: 0; font-size: 18px; font-weight: 700; }

.sidebar-content { flex: 1; overflow-y: auto; padding: 0 20px 24px 20px; display: flex; flex-direction: column; gap: 16px; }
.inner-card { background-color: var(--md-sys-color-surface-container); border-radius: var(--radius-medium); padding: 16px; }
.card-subtitle { margin: 0 0 16px 0; font-size: 12px; font-weight: 700; color: var(--md-sys-color-on-surface-variant); letter-spacing: 0.5px; text-transform: uppercase; display: flex; align-items: center; gap: 6px; }

/* Grille Stats & Composition */
.tiles-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.md-tile { background-color: var(--md-sys-color-surface-card); padding: 12px; border-radius: var(--radius-small); display: flex; flex-direction: column; align-items: center; border: 1px solid rgba(0,0,0,0.02); }
.tile-icon { font-size: 20px; margin-bottom: 4px; color: var(--md-sys-color-on-surface-variant); }
.tile-val { font-weight: 700; font-size: 15px; }
.tile-label { font-size: 11px; font-weight: 600; color: var(--md-sys-color-outline); margin-top: 2px; }

.surface-bar { display: flex; justify-content: space-between; font-size: 13px; margin-bottom: 6px; font-weight: 600; }
.surface-progress-bg { width: 100%; height: 6px; background-color: var(--md-sys-color-surface-container-high); border-radius: var(--radius-pill); overflow: hidden; margin-bottom: 12px; }
.surface-progress-fill { height: 100%; background-color: var(--md-sys-color-primary); }

.trail-list { display: flex; flex-wrap: wrap; gap: 6px; }
.trail-chip { background-color: var(--md-sys-color-surface-card); border: 1px solid var(--md-sys-color-outline-variant); padding: 6px 12px; border-radius: var(--radius-small); font-size: 12px; font-weight: 600; }

/* Recoms Cards */
.recom-card { background-color: var(--md-sys-color-surface-container); border-radius: var(--radius-medium); padding: 16px; cursor: pointer; border: 1px solid transparent; display: flex; flex-direction: column; gap: 10px; }
.recom-card:hover { background-color: var(--md-sys-color-surface-container-high); border-color: var(--md-sys-color-outline-variant); }
.recom-header { display: flex; justify-content: space-between; align-items: start; gap: 10px; }
.recom-name { font-weight: 700; font-size: 14px; line-height: 1.3; }

.difficulty-badge { padding: 4px 8px; border-radius: 6px; font-size: 10px; font-weight: 800; text-transform: uppercase; }
.badge-facile { background-color: #d1e8d5; color: #204029; }
.badge-moyen { background-color: #fcebbb; color: #594405; }
.badge-difficile { background-color: #fad4c8; color: #702f1a; }
.recom-meta { display: flex; gap: 10px; font-size: 12.5px; color: var(--md-sys-color-on-surface-variant); font-weight: 500; }

.panel-options { padding: 0 20px 16px 20px; }

/* --- FOOTER ET SNACKBARS --- */
.sidebar-footer { padding: 16px 20px 24px 20px; background: var(--md-sys-color-surface); border-top: 1px solid var(--md-sys-color-outline-variant); }
.btn-group { display: flex; gap: 12px; }
.full-width { width: 100%; }

.md-button { border: none; border-radius: var(--radius-pill); font-size: 14px; font-weight: 600; cursor: pointer; display: flex; justify-content: center; align-items: center; gap: 8px; padding: 14px 20px; flex: 1; }
.md-button.hidden { display: none; }
.md-button-primary { background-color: var(--md-sys-color-primary); color: var(--md-sys-color-on-primary); }
.md-button-primary:hover { background-color: #1f4f36; }
.md-button-secondary { background-color: transparent; color: var(--md-sys-color-on-surface); border: 1px solid var(--md-sys-color-outline-variant); }
.md-button-secondary:hover { background-color: var(--md-sys-color-surface-container); }

.md-snackbar {
    position: absolute; top: 24px; left: 50%; transform: translateX(-50%);
    background-color: #2e312f; color: #f0f5f1; padding: 14px 24px;
    border-radius: var(--radius-pill); display: flex; align-items: center; gap: 12px;
    font-size: 13.5px; z-index: 20; box-shadow: var(--md-shadow-2);
}
.md-snackbar.hidden { display: none; }

/* --- FAB M3 --- */
.md-fab {
    position: absolute; bottom: 24px; left: 24px; width: 56px; height: 56px;
    border-radius: var(--radius-medium); background-color: var(--md-sys-color-primary-container); 
    color: var(--md-sys-color-on-primary-container); border: none; box-shadow: var(--md-shadow-2);
    display: flex; justify-content: center; align-items: center; cursor: pointer; z-index: 20; 
}
.md-fab.hidden { transform: scale(0); pointer-events: none; }
.md-fab:hover { background-color: #b7efd0; }
#btn-reopen-recoms { bottom: 92px; background-color: var(--md-sys-color-surface-card); color: var(--md-sys-color-primary); border: 1px solid var(--md-sys-color-outline-variant); box-shadow: var(--md-shadow-1); }

/* --- RESPONSIVE MOBILE --- */
@media (max-width: 768px) {
    #sidebar, #recoms-panel { top: auto; bottom: 0; left: 0; width: 100%; height: 58vh; border-radius: var(--radius-large) var(--radius-large) 0 0; transform: translateY(100%); border-right: none; border-top: 1px solid var(--md-sys-color-outline-variant); }
    #sidebar:not(.hidden) { transform: translateY(0); animation: none; }
    #recoms-panel.visible { transform: translateY(0); animation: none; }
    
    .tiles-grid { grid-template-columns: repeat(3, 1fr); gap: 6px; }
    #top-controls { top: 20px; right: 16px; left: 16px; flex-direction: row; justify-content: space-between; align-items: center; }
    .md-switch-card { padding: 6px 12px; flex-direction: row; gap: 16px; min-width: auto; border-radius: var(--radius-pill); }
    .md-snackbar { width: 92%; top: 80px; text-align: center; justify-content: center; }
    .md-fab { left: 50%; transform: translateX(-50%) scale(1); bottom: 20px; }
    .md-fab.hidden { transform: translateX(-50%) scale(0); }
    #btn-reopen-recoms { bottom: 84px; transform: translateX(-50%) scale(1); }
    #btn-reopen-recoms.hidden { transform: translateX(-50%) scale(0); }
}