/**
 * Kiara Chat - Responsive Design
 * Story 3.5 - Responsive design (desktop, mobile fullscreen/drawer, tablette)
 *
 * Breakpoints Bootstrap standard :
 * - sm: 576px
 * - md: 768px  (desktop start)
 * - lg: 992px
 * - xl: 1200px
 *
 * Mobile-first approach : styles mobile par défaut, overrides desktop via media queries
 */

/* ============================================
   Tâche 1 : Breakpoints et Variables
   ============================================ */

:root {
    /* Desktop dimensions (AC-3.5.1) */
    --ka-desktop-w: 340px;
    --ka-desktop-h: 500px;

    /* Tablette dimensions (AC-3.5.3) */
    --ka-tablet-w: 400px;
    --ka-tablet-h: 600px;

    /* Launcher dimensions */
    --ka-launcher-desktop: 60px;
    --ka-launcher-mobile: 56px;

    /* Spacing */
    --ka-spacing-desktop: 20px;
    --ka-spacing-mobile: 16px;

    /* Animation duration (AC-3.5.5) */
    --ka-anim-duration: 300ms;
    --ka-anim-easing: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   Tâche 2 : Mode Desktop (>= 768px)
   AC-3.5.1 : Fenêtre flottante 340x500px, position fixed bottom-right
   ============================================ */

@media (min-width: 768px) {
    .ka-window {
        width: var(--ka-desktop-w) !important;
        height: var(--ka-desktop-h) !important;
        bottom: calc(var(--ka-launcher-desktop) + var(--ka-spacing-desktop) + 12px) !important;
        right: var(--ka-spacing-desktop) !important;
        border-radius: 1rem !important;
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15) !important;

        /* Animation fade-in + scale (AC-3.5.5) */
        transition: opacity var(--ka-anim-duration) var(--ka-anim-easing),
                    transform var(--ka-anim-duration) var(--ka-anim-easing);
    }

    /* État fermé */
    .ka-root[data-open="false"] .ka-window {
        opacity: 0;
        transform: translateY(10px) scale(0.95);
        pointer-events: none;
    }

    /* État ouvert - Animation fade-in + scale (AC-3.5.5) */
    .ka-root[data-open="true"] .ka-window {
        opacity: 1;
        transform: translateY(0) scale(1);
        pointer-events: auto;
    }

    /* Body height adjusted for desktop */
    .ka-body {
        height: calc(var(--ka-desktop-h) - 64px - 84px) !important;
    }
}

/* ============================================
   Tâche 3 : Mode Mobile (< 768px)
   AC-3.5.2 : Fullscreen avec transition slide-up depuis bas
   ============================================ */

@media (max-width: 767px) {
    .ka-window {
        width: 100vw !important;
        height: 100vh !important;
        height: 100dvh !important; /* Dynamic viewport height (mobile browsers) */
        bottom: 0 !important;
        right: 0 !important;
        left: 0 !important;
        top: 0 !important;
        border-radius: 0 !important;
        position: fixed !important;

        /* Animation slide-up (AC-3.5.2) */
        transition: transform var(--ka-anim-duration) var(--ka-anim-easing);
    }

    /* État fermé - Hors écran (slide-up) */
    .ka-root[data-open="false"] .ka-window {
        transform: translateY(100%);
        pointer-events: none;
    }

    /* État ouvert - Slide-up animation (AC-3.5.2) */
    .ka-root[data-open="true"] .ka-window {
        transform: translateY(0);
        pointer-events: auto;
    }

    /* Safe area iOS (notch) - AC-3.5.2 */
    .ka-window {
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
    }

    /* Header sticky en haut (AC-3.5.2) */
    .ka-header {
        position: sticky;
        top: 0;
        z-index: 10;
    }

    /* Body messages scrollable avec safe-area (AC-3.5.2) */
    .ka-body {
        height: calc(100dvh - 64px - 84px - env(safe-area-inset-top) - env(safe-area-inset-bottom)) !important;
        -webkit-overflow-scrolling: touch; /* Smooth scrolling iOS */
    }

    /* Footer input fixé en bas (AC-3.5.2) */
    .ka-footer {
        position: sticky;
        bottom: 0;
        z-index: 10;
        /* Avoid keyboard overlap */
        padding-bottom: calc(10px + env(safe-area-inset-bottom));
    }

    /* Bouton close bien visible mobile (AC-3.5.2) */
    .ka-header .ka-iconbtn {
        width: 32px;
        height: 32px;
    }

    .ka-header .ka-iconbtn i {
        font-size: 16px;
    }
}

/* ============================================
   Tâche 4 : Mode Tablette (768-1023px)
   AC-3.5.3 : Drawer 400x600px ou fullscreen selon orientation
   ============================================ */

/* Tablette portrait : drawer 400x600px */
@media (min-width: 768px) and (max-width: 1023px) and (orientation: portrait) {
    .ka-window {
        width: var(--ka-tablet-w) !important;
        height: var(--ka-tablet-h) !important;
        bottom: 50% !important;
        right: 50% !important;
        transform: translate(50%, 50%) !important;
        border-radius: 1rem !important;
    }

    /* État fermé */
    .ka-root[data-open="false"] .ka-window {
        opacity: 0;
        transform: translate(50%, 50%) scale(0.95) !important;
        pointer-events: none;
    }

    /* État ouvert */
    .ka-root[data-open="true"] .ka-window {
        opacity: 1;
        transform: translate(50%, 50%) scale(1) !important;
        pointer-events: auto;
    }

    .ka-body {
        height: calc(var(--ka-tablet-h) - 64px - 84px) !important;
    }
}

/* Tablette landscape : fenêtre flottante bottom-right (AC-3.5.3) */
@media (min-width: 768px) and (max-width: 1023px) and (orientation: landscape) {
    .ka-window {
        width: var(--ka-tablet-w) !important;
        height: var(--ka-tablet-h) !important;
        bottom: calc(var(--ka-launcher-desktop) + var(--ka-spacing-desktop) + 12px) !important;
        right: var(--ka-spacing-desktop) !important;
        border-radius: 1rem !important;
    }

    .ka-body {
        height: calc(var(--ka-tablet-h) - 64px - 84px) !important;
    }
}

/* ============================================
   Tâche 5 : Launcher Responsive
   AC-3.5.4 : Desktop (60px), Mobile (FAB 56px)
   ============================================ */

/* Desktop : bouton circulaire 60px (AC-3.5.4) */
@media (min-width: 768px) {
    .ka-launcher {
        width: var(--ka-launcher-desktop);
        height: var(--ka-launcher-desktop);
        bottom: var(--ka-spacing-desktop);
        right: var(--ka-spacing-desktop);
    }

    .ka-launcher i {
        font-size: 24px;
    }

    /* Badge notification (AC-3.5.4) */
    .ka-root[data-unread="true"] .ka-badge {
        display: block;
    }
}

/* Mobile : FAB 56px bottom-right (AC-3.5.4) */
@media (max-width: 767px) {
    .ka-launcher {
        width: var(--ka-launcher-mobile);
        height: var(--ka-launcher-mobile);
        bottom: var(--ka-spacing-mobile);
        right: var(--ka-spacing-mobile);
    }

    .ka-launcher i {
        font-size: 22px;
    }

    /* Tooltip hidden on mobile */
    .ka-tooltip {
        display: none !important;
    }

    /* Badge notification mobile (AC-3.5.4) */
    .ka-root[data-unread="true"] .ka-badge {
        display: block;
    }
}

/* ============================================
   Tâche 6 : Animations et Transitions
   AC-3.5.5 : Transitions fluides open/close
   AC-3.5.7 : Performance 60fps, GPU-accelerated
   ============================================ */

/* GPU-accelerated animations (transform, opacity only) */
.ka-window,
.ka-launcher {
    will-change: transform, opacity;
}

/* Animation keyframes desktop : fade-in + scale (AC-3.5.5) */
@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* Animation keyframes mobile : slide-up (AC-3.5.5) */
@keyframes slideUp {
    from {
        transform: translateY(100%);
    }
    to {
        transform: translateY(0);
    }
}

/* Animation keyframes tablet portrait : fade-in + scale centered */
@keyframes fadeInScaleCentered {
    from {
        opacity: 0;
        transform: translate(50%, 50%) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translate(50%, 50%) scale(1);
    }
}

/* Optimisation performance : reduce motion (AC-3.5.7) */
@media (prefers-reduced-motion: reduce) {
    .ka-window,
    .ka-launcher {
        transition: none !important;
        animation: none !important;
    }
}

/* ============================================
   Tâche 7 : Tests Devices & Performance
   Notes pour validation AC-3.5.6, AC-3.5.7
   ============================================ */

/*
 * Tests à effectuer (AC-3.5.6) :
 *
 * Desktop :
 * - Chrome, Firefox, Safari (Mac), Edge (Windows)
 *
 * Mobile :
 * - iOS Safari (iPhone 12+, SE, iPad)
 * - Chrome Android (Pixel, Samsung)
 * - Firefox Android
 *
 * Tablette :
 * - iPad Pro (portrait & landscape)
 * - Samsung Galaxy Tab
 *
 * Performance (AC-3.5.7) :
 * - Chrome DevTools Performance panel : 60fps constant
 * - Temps open/close < 300ms
 * - Pas de janking scroll (will-change appliqué)
 */