/* =============================================================================
   YPSIUM Design System — fondation graphique unifiee
   =============================================================================
   Une seule source de verite pour toutes les surfaces YPSIUM.
   Pour les surfaces Tailwind: utiliser le preset equivalent ypsium-tailwind-preset.js
   Doc complete: docs/design-charter.md
   ========================================================================== */

/* ========== 1. DESIGN TOKENS ========== */

:root {
    /* --- Palette YPSIUM (violet primaire) --- */
    --ypp-50:  #f5f1fa;
    --ypp-100: #ebe2f5;
    --ypp-200: #d5c2eb;
    --ypp-300: #b9a2dd;
    --ypp-400: #9a7dc3;
    --ypp-500: #7d59a3;
    --ypp-600: #5D3E81;   /* couleur signature */
    --ypp-700: #4a3168;
    --ypp-800: #382550;
    --ypp-900: #2d1d40;

    /* Alias semantiques */
    --ypp:        var(--ypp-600);
    --ypp-dark:   var(--ypp-700);
    --ypp-soft:   var(--ypp-50);
    --ypp-border: var(--ypp-100);

    /* --- Neutres (slate) --- */
    --ink:        #1e293b;   /* slate-800, texte principal */
    --ink-soft:   #64748b;   /* slate-500, texte secondaire */
    --ink-faint:  #94a3b8;   /* slate-400, placeholder */
    --line:       #e2e8f0;   /* slate-200, separators */
    --line-soft:  #f1f5f9;   /* slate-100 */
    --bg:         #ffffff;
    --bg-soft:    #f8fafc;   /* slate-50 */

    /* --- Status colors --- */
    --ok:        #10b981;    /* emerald-500 */
    --ok-soft:   #d1fae5;
    --warn:      #f59e0b;    /* amber-500 */
    --warn-soft: #fef3c7;
    --err:       #e11d48;    /* rose-600 */
    --err-soft:  #ffe4e6;
    --info:      var(--ypp);
    --info-soft: var(--ypp-soft);

    /* --- Typo --- */
    --font-serif: Georgia, 'Times New Roman', serif;
    --font-sans:  'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono:  'Consolas', 'Monaco', 'Courier New', monospace;

    /* --- Radius --- */
    --r-sm: 4px;
    --r:    6px;     /* inputs */
    --r-md: 8px;     /* boutons, badges */
    --r-lg: 12px;    /* cards */
    --r-xl: 16px;    /* modals */
    --r-full: 9999px;

    /* --- Shadows (teintees ypsium) --- */
    --sh-sm:  0 1px 2px rgba(93, 62, 129, 0.04);
    --sh:     0 2px 8px rgba(93, 62, 129, 0.06);
    --sh-md:  0 4px 16px rgba(93, 62, 129, 0.10);
    --sh-lg:  0 8px 24px rgba(93, 62, 129, 0.15);
    --sh-xl:  0 16px 40px rgba(93, 62, 129, 0.20);

    /* --- Transitions --- */
    --t-fast: 100ms ease;
    --t:      150ms ease;
    --t-slow: 250ms ease;

    /* --- Z-index --- */
    --z-sticky:  10;
    --z-dropdown: 30;
    --z-modal:   100;
    --z-toast:   200;
}


/* ========== 2. RESET LEGER ========== */

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

html { -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font-sans);
    font-feature-settings: 'cv11', 'ss01';
    color: var(--ink);
    background: var(--bg);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }
a { color: inherit; text-decoration: none; }


/* ========== 3. TYPOGRAPHIE ========== */

h1, h2, h3, h4, .yp-serif {
    font-family: var(--font-serif);
    font-weight: 600;
    color: var(--ypp);
    letter-spacing: 0.2px;
    line-height: 1.25;
}
h1 { font-size: 1.875rem; }   /* 30px */
h2 { font-size: 1.5rem; }     /* 24px */
h3 { font-size: 1.15rem; }    /* 18px */
h4 { font-size: 1rem; color: var(--ink); }

.yp-mono { font-family: var(--font-mono); font-size: 0.85em; }

.yp-text-soft { color: var(--ink-soft); }
.yp-text-faint { color: var(--ink-faint); }
.yp-text-ypp { color: var(--ypp); }
.yp-text-ok { color: var(--ok); }
.yp-text-warn { color: var(--warn); }
.yp-text-err { color: var(--err); }


/* ========== 4. BOUTONS ========== */

.yp-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.55rem 1.1rem;
    border: 1px solid transparent;
    border-radius: var(--r-md);
    font-size: 0.9rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--t);
    user-select: none;
    white-space: nowrap;
}
.yp-btn:active { transform: scale(0.98); }
.yp-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.yp-btn:disabled:active { transform: none; }

.yp-btn-sm { padding: 0.35rem 0.75rem; font-size: 0.82rem; }
.yp-btn-lg { padding: 0.75rem 1.5rem; font-size: 1rem; }

.yp-btn-primary { background: var(--ypp); color: #fff; }
.yp-btn-primary:hover:not(:disabled) { background: var(--ypp-dark); box-shadow: var(--sh-md); }

.yp-btn-secondary { background: #fff; color: var(--ink); border-color: var(--line); }
.yp-btn-secondary:hover:not(:disabled) { background: var(--bg-soft); border-color: var(--ypp-border); }

.yp-btn-ghost { background: transparent; color: var(--ypp); border-color: var(--ypp-border); }
.yp-btn-ghost:hover:not(:disabled) { background: var(--ypp-soft); }

.yp-btn-danger { background: var(--err); color: #fff; }
.yp-btn-danger:hover:not(:disabled) { background: #be123c; }

.yp-btn-success { background: var(--ok); color: #fff; }
.yp-btn-success:hover:not(:disabled) { background: #059669; }

.yp-btn-warning { background: var(--warn); color: #fff; }
.yp-btn-warning:hover:not(:disabled) { background: #d97706; }


/* ========== 5. INPUTS / FORMS ========== */

.yp-input,
.yp-select,
.yp-textarea {
    width: 100%;
    padding: 0.55rem 0.8rem;
    border: 1px solid var(--line);
    border-radius: var(--r);
    background: #fff;
    color: var(--ink);
    font-size: 0.92rem;
    font-family: inherit;
    transition: border-color var(--t), box-shadow var(--t);
}
.yp-input:focus,
.yp-select:focus,
.yp-textarea:focus {
    outline: none;
    border-color: var(--ypp);
    box-shadow: 0 0 0 3px var(--ypp-soft);
}
.yp-textarea { min-height: 80px; resize: vertical; }

.yp-label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--ink-soft);
    margin-bottom: 0.3rem;
}
.yp-field { margin-bottom: 1rem; }
.yp-help { font-size: 0.78rem; color: var(--ink-soft); margin-top: 0.3rem; line-height: 1.4; }


/* ========== 6. CARDS ========== */

.yp-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    padding: 1.4rem;
    box-shadow: var(--sh);
    transition: box-shadow var(--t), transform var(--t), border-color var(--t);
}
.yp-card-hover:hover {
    transform: translateY(-2px);
    box-shadow: var(--sh-lg);
    border-color: var(--ypp-border);
}
.yp-card-flat { box-shadow: none; }

.yp-card-head {
    margin: -1.4rem -1.4rem 1rem;
    padding: 1rem 1.4rem;
    border-bottom: 1px solid var(--line);
    background: var(--bg-soft);
    border-top-left-radius: var(--r-lg);
    border-top-right-radius: var(--r-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}
.yp-card-head h3 { margin: 0; }


/* ========== 7. TILES (dashboard apps) ========== */

.yp-tile {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    padding: 1.5rem;
    box-shadow: var(--sh-sm);
    transition: all var(--t);
    text-decoration: none;
    color: inherit;
    display: block;
    cursor: pointer;
}
.yp-tile:hover {
    transform: translateY(-3px);
    box-shadow: var(--sh-lg);
    border-color: var(--ypp-border);
}
.yp-tile-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--r-lg);
    background: var(--ypp-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    line-height: 1;
    margin-bottom: 0.8rem;
}
.yp-tile-title {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--ypp);
    margin-bottom: 0.3rem;
}
.yp-tile-desc { color: var(--ink-soft); font-size: 0.88rem; line-height: 1.5; }
.yp-tile-cta {
    margin-top: 0.8rem;
    color: var(--ypp);
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}


/* ========== 8. KPI / STAT CARDS ========== */

.yp-stat {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    padding: 1.2rem;
    text-align: center;
    box-shadow: var(--sh-sm);
    transition: all var(--t);
}
.yp-stat:hover { transform: translateY(-2px); box-shadow: var(--sh-md); }
.yp-stat-value {
    font-family: var(--font-serif);
    font-size: 1.9rem;
    font-weight: 700;
    color: var(--ypp);
    line-height: 1.1;
}
.yp-stat-label {
    font-size: 0.78rem;
    color: var(--ink-soft);
    margin-top: 0.4rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}


/* ========== 9. BADGES ========== */

.yp-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.2rem 0.55rem;
    border-radius: var(--r);
    font-size: 0.72rem;
    font-weight: 700;
    font-family: var(--font-sans);
    line-height: 1.3;
}
.yp-badge-ok { background: var(--ok-soft); color: #047857; }
.yp-badge-warn { background: var(--warn-soft); color: #92400e; }
.yp-badge-err { background: var(--err-soft); color: #be123c; }
.yp-badge-info { background: var(--ypp-soft); color: var(--ypp); }
.yp-badge-neutral { background: var(--bg-soft); color: var(--ink-soft); }


/* ========== 10. TABLES ========== */

.yp-table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.yp-table th {
    text-align: left;
    padding: 0.75rem 0.9rem;
    background: var(--bg-soft);
    color: var(--ink-soft);
    font-weight: 700;
    font-size: 0.74rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--line);
}
.yp-table td {
    padding: 0.75rem 0.9rem;
    border-bottom: 1px solid var(--line);
}
.yp-table tbody tr:hover { background: var(--bg-soft); }
.yp-table tbody tr:last-child td { border-bottom: none; }
.yp-table .text-right { text-align: right; }


/* ========== 11. MODALS ========== */

.yp-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(30, 41, 59, 0.5);
    backdrop-filter: blur(3px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    padding: 1rem;
}
.yp-modal-overlay.show { display: flex; animation: yp-fadein var(--t); }
.yp-modal {
    background: #fff;
    border-radius: var(--r-xl);
    padding: 2rem;
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--sh-xl);
    animation: yp-slideup var(--t-slow);
}
.yp-modal-head { margin-bottom: 1.2rem; }
.yp-modal-actions { display: flex; gap: 0.5rem; justify-content: flex-end; margin-top: 1.5rem; }

@keyframes yp-fadein { from { opacity: 0; } to { opacity: 1; } }
@keyframes yp-slideup { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }


/* ========== 12. TOASTS ========== */

.yp-toast {
    position: fixed;
    top: 1rem;
    right: 1rem;
    padding: 0.9rem 1.3rem;
    border-radius: var(--r-md);
    font-size: 0.9rem;
    font-weight: 600;
    z-index: var(--z-toast);
    box-shadow: var(--sh-lg);
    opacity: 0;
    transform: translateX(20px);
    transition: all var(--t);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    max-width: 400px;
}
.yp-toast.show { opacity: 1; transform: translateX(0); }
.yp-toast-ok { background: var(--ok); color: #fff; }
.yp-toast-err { background: var(--err); color: #fff; }
.yp-toast-warn { background: var(--warn); color: #fff; }
.yp-toast-info { background: var(--ypp); color: #fff; }


/* ========== 13. EMPTY STATES ========== */

.yp-empty {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--ink-soft);
}
.yp-empty-icon {
    font-size: 3rem;
    line-height: 1;
    margin-bottom: 1rem;
    opacity: 0.6;
}
.yp-empty-title { font-family: var(--font-serif); color: var(--ypp); margin-bottom: 0.5rem; }
.yp-empty-desc { font-size: 0.9rem; max-width: 380px; margin: 0 auto 1.2rem; line-height: 1.5; }


/* ========== 14. SKELETONS (loading) ========== */

.yp-skel {
    background: linear-gradient(90deg, var(--line-soft) 25%, var(--line) 37%, var(--line-soft) 63%);
    background-size: 400% 100%;
    animation: yp-shimmer 1.4s linear infinite;
    border-radius: var(--r);
}
.yp-skel-line { height: 0.9rem; margin-bottom: 0.5rem; }
.yp-skel-line:last-child { margin-bottom: 0; width: 60%; }
@keyframes yp-shimmer { from { background-position: 200% 0; } to { background-position: -200% 0; } }


/* ========== 15. HELPERS UTILITAIRES ========== */

.yp-flex { display: flex; }
.yp-flex-col { display: flex; flex-direction: column; }
.yp-items-center { align-items: center; }
.yp-justify-between { justify-content: space-between; }
.yp-justify-end { justify-content: flex-end; }
.yp-gap-1 { gap: 0.25rem; }
.yp-gap-2 { gap: 0.5rem; }
.yp-gap-3 { gap: 0.75rem; }
.yp-gap-4 { gap: 1rem; }

.yp-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.yp-grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem; }
.yp-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.yp-grid-stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 1rem; }
.yp-grid-tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1.2rem; }

.yp-mt-1 { margin-top: 0.5rem; }
.yp-mt-2 { margin-top: 1rem; }
.yp-mt-3 { margin-top: 1.5rem; }
.yp-mt-4 { margin-top: 2rem; }
.yp-mb-1 { margin-bottom: 0.5rem; }
.yp-mb-2 { margin-bottom: 1rem; }
.yp-mb-3 { margin-bottom: 1.5rem; }
.yp-mb-4 { margin-bottom: 2rem; }

.yp-hidden { display: none !important; }
.yp-w-full { width: 100%; }


/* ========== 16. SCROLLBAR ========== */

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--ypp-border); border-radius: var(--r); }
::-webkit-scrollbar-thumb:hover { background: var(--ypp); }