/* =====================================================================
   TRAVEL BOOKING DRC — PREMIUM DESIGN SYSTEM
   Fichier : assets/css/premium.css
   Rôle : Loader unique, micro-interactions, animations cohérentes,
          responsive global. NE TOUCHE PAS À LA LOGIQUE MÉTIER.
   ===================================================================== */

/* ============================================================
   1. VARIABLES GLOBALES (design tokens)
   ============================================================ */
:root {
    --blue: #1BA7FF;
    --blue-dark: #0D8FD9;
    --yellow: #FFD100;
    --red: #CE1126;
    --white: #FFFFFF;
    --dark: #0A1628;
    --footer-bg: #0B1A30;
    --text: #1F2937;
    --text-gray: #6B7280;

    --t-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
    --t-normal: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    --t-slow: 0.45s cubic-bezier(0.4, 0, 0.2, 1);
    --t-reveal: 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-smooth: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

    --shadow-sm: 0 2px 8px rgba(10, 22, 40, 0.06);
    --shadow-md: 0 6px 20px rgba(10, 22, 40, 0.08);
    --shadow-lg: 0 18px 45px rgba(10, 22, 40, 0.12);
    --shadow-xl: 0 30px 70px rgba(10, 22, 40, 0.18);

    --r-sm: 8px;
    --r-md: 12px;
    --r-lg: 18px;
    --r-xl: 24px;
    --r-pill: 50px;

    --loader-bg-1: #060B18;
    --loader-bg-2: #0A1628;
    --loader-bg-3: #131F3A;
}

/* ============================================================
   2. RESET LÉGER + BASES
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

img, video, iframe { max-width: 100%; height: auto; display: block; }

body.tbd-locked { overflow: hidden !important; }

/* ============================================================
   3. LOADER UNIQUE SPECTACULAIRE
   ============================================================ */
#tbd-loader {
    position: fixed;
    inset: 0;
    z-index: 99999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(circle at 20% 30%, rgba(27, 167, 255, 0.15) 0%, transparent 45%),
        radial-gradient(circle at 80% 70%, rgba(206, 17, 38, 0.12) 0%, transparent 45%),
        radial-gradient(circle at 50% 50%, rgba(255, 209, 0, 0.06) 0%, transparent 60%),
        linear-gradient(135deg, var(--loader-bg-1) 0%, var(--loader-bg-2) 45%, var(--loader-bg-3) 100%);
    overflow: hidden;
    transition: opacity 0.9s var(--ease-smooth), visibility 0.9s var(--ease-smooth);
}

#tbd-loader.tbd-loader-hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

#tbd-loader::before {
    content: '';
    position: absolute;
    inset: -50%;
    background:
        conic-gradient(from 0deg at 50% 50%,
            transparent 0deg,
            rgba(27, 167, 255, 0.06) 60deg,
            transparent 120deg,
            rgba(255, 209, 0, 0.05) 180deg,
            transparent 240deg,
            rgba(206, 17, 38, 0.05) 300deg,
            transparent 360deg);
    animation: tbdLoaderSweep 12s linear infinite;
    pointer-events: none;
}

@keyframes tbdLoaderSweep {
    to { transform: rotate(360deg); }
}

#tbd-loader::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px);
    background-size: 32px 32px;
    mask-image: radial-gradient(circle at 50% 50%, #000 0%, transparent 75%);
    -webkit-mask-image: radial-gradient(circle at 50% 50%, #000 0%, transparent 75%);
    pointer-events: none;
    opacity: 0.5;
}

.tbd-loader-stage {
    position: relative;
    width: 260px;
    height: 260px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

.tbd-loader-halo {
    position: absolute;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    background: radial-gradient(circle,
        rgba(27, 167, 255, 0.35) 0%,
        rgba(27, 167, 255, 0.12) 35%,
        transparent 70%);
    filter: blur(18px);
    animation: tbdHaloPulse 3s ease-in-out infinite;
}

@keyframes tbdHaloPulse {
    0%, 100% { transform: scale(1); opacity: 0.85; }
    50%      { transform: scale(1.15); opacity: 1; }
}

.tbd-ring-outer {
    position: absolute;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    border: 1.5px solid transparent;
    background:
        linear-gradient(transparent, transparent) padding-box,
        conic-gradient(from 0deg,
            var(--blue) 0deg,
            var(--yellow) 120deg,
            var(--red) 240deg,
            var(--blue) 360deg) border-box;
    -webkit-mask:
        linear-gradient(#000 0 0) padding-box,
        linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    animation: tbdSpin 4.5s linear infinite;
    opacity: 0.9;
}

.tbd-ring-mid {
    position: absolute;
    width: 195px;
    height: 195px;
    border-radius: 50%;
    border: 1.5px dashed rgba(255, 255, 255, 0.18);
    animation: tbdSpinReverse 9s linear infinite;
}

.tbd-ring-inner {
    position: absolute;
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 1px solid rgba(27, 167, 255, 0.35);
    box-shadow:
        0 0 18px rgba(27, 167, 255, 0.35),
        inset 0 0 18px rgba(27, 167, 255, 0.15);
    animation: tbdSpin 6s linear infinite;
}

@keyframes tbdSpin {
    to { transform: rotate(360deg); }
}
@keyframes tbdSpinReverse {
    to { transform: rotate(-360deg); }
}

.tbd-orbit {
    position: absolute;
    inset: 0;
    animation: tbdSpin 5s linear infinite;
}
.tbd-orbit--slow { animation-duration: 8s; animation-direction: reverse; }
.tbd-orbit--fast { animation-duration: 3.5s; }

.tbd-particle {
    position: absolute;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform-origin: 0 0;
    box-shadow: 0 0 10px currentColor, 0 0 22px currentColor;
}
.tbd-particle--blue   { background: var(--blue);   color: var(--blue);   transform: rotate(0deg)   translate(120px) rotate(0deg); }
.tbd-particle--yellow { background: var(--yellow); color: var(--yellow); transform: rotate(120deg) translate(120px) rotate(-120deg); }
.tbd-particle--red    { background: var(--red);    color: var(--red);    transform: rotate(240deg) translate(120px) rotate(-240deg); }

.tbd-orbit--slow .tbd-particle--blue   { transform: rotate(0deg)   translate(97px)  rotate(0deg); }
.tbd-orbit--slow .tbd-particle--yellow { transform: rotate(180deg) translate(97px)  rotate(-180deg); }

.tbd-orbit--fast .tbd-particle--red    { transform: rotate(60deg)  translate(75px)  rotate(-60deg); }

.tbd-loader-logo {
    position: relative;
    z-index: 5;
    width: 110px;
    height: auto;
    max-width: 110px;
    object-fit: contain;
    filter:
        drop-shadow(0 0 20px rgba(27, 167, 255, 0.55))
        drop-shadow(0 0 40px rgba(255, 209, 0, 0.25));
    animation: tbdLogoFloat 3.2s ease-in-out infinite;
    user-select: none;
    -webkit-user-drag: none;
}

@keyframes tbdLogoFloat {
    0%, 100% { transform: translateY(0) scale(1); }
    50%      { transform: translateY(-8px) scale(1.045); }
}

.tbd-loader-fallback {
    position: relative;
    z-index: 5;
    font-family: 'Poppins', sans-serif;
    font-weight: 900;
    font-size: 2rem;
    letter-spacing: 4px;
    background: linear-gradient(90deg, var(--blue), var(--yellow), var(--red), var(--blue));
    background-size: 300% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: tbdGradientMove 3s linear infinite;
    display: none;
}

.tbd-loader-logo.tbd-logo-error { display: none; }
.tbd-loader-logo.tbd-logo-error ~ .tbd-loader-fallback { display: block; }

@keyframes tbdGradientMove {
    to { background-position: 300% 0; }
}

.tbd-loader-text {
    position: relative;
    z-index: 3;
    margin-top: 42px;
    font-family: 'Poppins', 'Inter', sans-serif;
    font-size: 0.95rem;
    font-weight: 800;
    letter-spacing: 8px;
    text-transform: uppercase;
    color: #FFFFFF;
    text-shadow:
        0 0 18px rgba(27, 167, 255, 0.6),
        0 0 36px rgba(255, 209, 0, 0.25);
    animation: tbdTextShimmer 2.4s ease-in-out infinite;
}

@keyframes tbdTextShimmer {
    0%, 100% { letter-spacing: 8px; opacity: 0.85; }
    50%      { letter-spacing: 10px; opacity: 1; }
}

.tbd-loader-subtext {
    position: relative;
    z-index: 3;
    margin-top: 10px;
    font-family: 'Inter', sans-serif;
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.55);
    animation: tbdSubtextFade 2.4s ease-in-out infinite;
}

@keyframes tbdSubtextFade {
    0%, 100% { opacity: 0.35; }
    50%      { opacity: 0.9; }
}

.tbd-loader-bar {
    position: relative;
    z-index: 3;
    margin-top: 30px;
    width: 220px;
    height: 3px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 4px;
    overflow: hidden;
}

.tbd-loader-bar-fill {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--blue), var(--yellow), var(--red));
    border-radius: 4px;
    box-shadow: 0 0 12px rgba(27, 167, 255, 0.7);
    transition: width 0.35s var(--ease-standard);
}

@media (max-width: 640px) {
    .tbd-loader-stage { width: 200px; height: 200px; }
    .tbd-ring-outer { width: 185px; height: 185px; }
    .tbd-ring-mid { width: 150px; height: 150px; }
    .tbd-ring-inner { width: 115px; height: 115px; }
    .tbd-loader-logo { width: 80px; max-width: 80px; }
    .tbd-loader-halo { width: 170px; height: 170px; }
    .tbd-particle--blue, .tbd-particle--yellow, .tbd-particle--red {
        width: 7px; height: 7px;
    }
    .tbd-particle--blue   { transform: rotate(0deg)   translate(92px) rotate(0deg); }
    .tbd-particle--yellow { transform: rotate(120deg) translate(92px) rotate(-120deg); }
    .tbd-particle--red    { transform: rotate(240deg) translate(92px) rotate(-240deg); }
    .tbd-orbit--slow .tbd-particle--blue   { transform: rotate(0deg)   translate(75px) rotate(0deg); }
    .tbd-orbit--slow .tbd-particle--yellow { transform: rotate(180deg) translate(75px) rotate(-180deg); }
    .tbd-orbit--fast .tbd-particle--red    { transform: rotate(60deg)  translate(58px) rotate(-60deg); }
    .tbd-loader-text { font-size: 0.78rem; letter-spacing: 6px; margin-top: 32px; }
    .tbd-loader-subtext { font-size: 0.6rem; letter-spacing: 3px; }
    .tbd-loader-bar { width: 170px; margin-top: 22px; }
}

/* ============================================================
   4. PAGE LOADER LEGACY — masqué par défaut
   ============================================================ */
body.tbd-premium-ready .page-loader {
    display: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
}

/* ============================================================
   5. BARRE DE PROGRESSION SCROLL
   ============================================================ */
#progress-bar-wrap {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    z-index: 10001;
    pointer-events: none;
    background: transparent;
}

#progress-bar {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--blue), var(--yellow), var(--red));
    box-shadow: 0 0 10px rgba(27, 167, 255, 0.5);
    transition: width 0.15s linear;
}

/* ============================================================
   6. MICRO-INTERACTIONS UNIFIÉES
   ============================================================ */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
    outline: 2px solid var(--blue);
    outline-offset: 2px;
    border-radius: 4px;
}

.btn-nav,
.btn-hero1,
.btn-submit,
.btn-search,
.view-all-posts-btn,
.promos-main-btn,
.visa-btn,
.btn-primary {
    position: relative;
    overflow: hidden;
    transition: transform var(--t-normal), box-shadow var(--t-normal), filter var(--t-normal);
    will-change: transform;
}

.btn-nav::after,
.btn-hero1::after,
.btn-submit::after,
.btn-search::after,
.view-all-posts-btn::after,
.promos-main-btn::after,
.visa-btn::after,
.btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg,
        transparent 30%,
        rgba(255, 255, 255, 0.28) 50%,
        transparent 70%);
    transform: translateX(-120%);
    transition: transform 0.7s var(--ease-smooth);
    pointer-events: none;
}

.btn-nav:hover::after,
.btn-hero1:hover::after,
.btn-submit:hover::after,
.btn-search:hover::after,
.view-all-posts-btn:hover::after,
.promos-main-btn:hover::after,
.visa-btn:hover::after,
.btn-primary:hover::after {
    transform: translateX(120%);
}

.service-card,
.promo-card,
.post-card,
.visa-card,
.team-card,
.testimonial-card,
.item-card,
.stat-card {
    transition:
        transform var(--t-slow),
        box-shadow var(--t-slow),
        border-color var(--t-slow);
    will-change: transform;
}

.service-card:hover,
.promo-card:hover,
.post-card:hover,
.visa-card:hover,
.team-card:hover,
.testimonial-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

#navbar .nav-link {
    position: relative;
    transition: color var(--t-normal), background var(--t-normal);
}
#navbar .nav-link::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 4px;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--blue), var(--red));
    border-radius: 2px;
    transform: translateX(-50%);
    transition: width var(--t-normal);
}
#navbar .nav-link:hover::after { width: 70%; }

input, select, textarea {
    transition: border-color var(--t-normal), box-shadow var(--t-normal), background var(--t-normal);
}

.service-card img,
.promo-card img,
.post-card img,
.visa-card img,
.team-card img {
    transition: transform 0.6s var(--ease-smooth);
}
.service-card:hover img,
.promo-card:hover img,
.post-card:hover img,
.visa-card:hover img,
.team-card:hover img {
    transform: scale(1.05);
}

/* ============================================================
   7. SCROLL REVEAL
   ============================================================ */
.tbd-reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity var(--t-reveal), transform var(--t-reveal);
    will-change: opacity, transform;
}
.tbd-reveal.tbd-revealed {
    opacity: 1;
    transform: translateY(0);
}

.tbd-reveal--left  { transform: translateX(-32px); }
.tbd-reveal--right { transform: translateX(32px); }
.tbd-reveal--scale { transform: scale(0.94); }

.tbd-reveal--left.tbd-revealed,
.tbd-reveal--right.tbd-revealed,
.tbd-reveal--scale.tbd-revealed {
    transform: translateX(0) scale(1);
}

/* ============================================================
   8. MENU MOBILE UNIFIÉ
   ============================================================ */
#mobile-menu {
    transition: transform 0.45s var(--ease-spring), right 0.45s var(--ease-spring);
}
#mobile-menu.active {
    box-shadow: -20px 0 60px rgba(10, 22, 40, 0.3);
}

#mobile-menu .mobile-nav-link {
    opacity: 0;
    transform: translateX(18px);
    transition:
        opacity 0.35s var(--ease-smooth),
        transform 0.35s var(--ease-smooth),
        background 0.3s var(--ease-standard),
        color 0.3s var(--ease-standard);
}
#mobile-menu.active .mobile-nav-link {
    opacity: 1;
    transform: translateX(0);
}
#mobile-menu.active .mobile-nav-link:nth-child(1) { transition-delay: 0.08s; }
#mobile-menu.active .mobile-nav-link:nth-child(2) { transition-delay: 0.12s; }
#mobile-menu.active .mobile-nav-link:nth-child(3) { transition-delay: 0.16s; }
#mobile-menu.active .mobile-nav-link:nth-child(4) { transition-delay: 0.20s; }
#mobile-menu.active .mobile-nav-link:nth-child(5) { transition-delay: 0.24s; }
#mobile-menu.active .mobile-nav-link:nth-child(6) { transition-delay: 0.28s; }
#mobile-menu.active .mobile-nav-link:nth-child(7) { transition-delay: 0.32s; }
#mobile-menu.active .mobile-nav-link:nth-child(8) { transition-delay: 0.36s; }
#mobile-menu.active .mobile-nav-link:nth-child(9) { transition-delay: 0.40s; }

/* ============================================================
   9. MODALES / TOASTS / NOTIFICATIONS
   ============================================================ */
.modal-overlay.active,
.selection-modal.active,
.image-viewer.active {
    animation: tbdFadeIn 0.25s var(--ease-standard);
}

@keyframes tbdFadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.selection-content,
.modal-content {
    animation: tbdModalUp 0.35s var(--ease-spring);
}

@keyframes tbdModalUp {
    from { opacity: 0; transform: translateY(24px) scale(0.97); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

.toast {
    animation: tbdToastIn 0.4s var(--ease-spring),
               tbdToastOut 0.4s var(--ease-standard) 2.6s forwards;
}

@keyframes tbdToastIn {
    from { opacity: 0; transform: translateX(80px); }
    to   { opacity: 1; transform: translateX(0); }
}
@keyframes tbdToastOut {
    to { opacity: 0; transform: translateX(80px); }
}

/* ============================================================
   10. RESPONSIVE — garde-fous globaux
   ============================================================ */
@media (max-width: 768px) {
    html { font-size: 15px; }
    body { -webkit-tap-highlight-color: transparent; }
    section, footer, header, nav {
        max-width: 100vw;
        overflow-x: clip;
    }
}

@media (max-width: 480px) {
    html { font-size: 14.5px; }
}

/* ============================================================
   11. ACCESSIBILITÉ
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
    .tbd-reveal { opacity: 1 !important; transform: none !important; }
    #tbd-loader .tbd-orbit,
    #tbd-loader .tbd-ring-outer,
    #tbd-loader .tbd-ring-mid,
    #tbd-loader .tbd-ring-inner,
    #tbd-loader .tbd-loader-halo,
    #tbd-loader .tbd-loader-logo {
        animation: none !important;
    }
}

/* ============================================================
   12. RESPONSIVE — ajustements navbar / sections
   ============================================================ */
@media (max-width: 1024px) {
    #navbar { padding: 10px 0; }
}

@media (max-width: 768px) {
    .container { padding: 0 16px; }
    .section { padding: 44px 0; }
    .section-title { font-size: 1.55rem; }
}

@media (max-width: 480px) {
    .container { padding: 0 14px; }
    .section { padding: 36px 0; }
    .section-title { font-size: 1.35rem; }
}

/* ============================================================
   13. ÉTATS VIDES HARMONISÉS
   ============================================================ */
.tbd-empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-gray);
}
.tbd-empty i {
    font-size: 3rem;
    color: #CBD5E1;
    margin-bottom: 14px;
    display: block;
}
.tbd-empty h3 {
    font-size: 1.1rem;
    color: var(--text);
    margin-bottom: 6px;
}
.tbd-empty p {
    font-size: 0.85rem;
    color: var(--text-gray);
}

/* ============================================================
   14. SKELETON LOADING
   ============================================================ */
.tbd-skeleton {
    background: linear-gradient(90deg,
        #EEF2F7 0%,
        #F8FAFC 50%,
        #EEF2F7 100%);
    background-size: 200% 100%;
    border-radius: var(--r-sm);
    animation: tbdSkeleton 1.4s ease-in-out infinite;
}

@keyframes tbdSkeleton {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ============================================================
   FIN
   ============================================================ */