/* ─────────────────────────────────────────────
   AP Textile Industries — style.css
   Dynamic transitions & animation system
───────────────────────────────────────────── */

/* ── Custom Scrollbar ── */
:root {
    --gold: #c8973d;
    --navy: #0f2240;
}

html {
    scroll-behavior: smooth;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #f1ede6; }
::-webkit-scrollbar-thumb { background: var(--gold); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #b07f2c; }

/* ── Section Padding ── */
.section-padding {
    padding-top: 5rem;
    padding-bottom: 5rem;
}
@media (min-width: 768px) {
    .section-padding {
        padding-top: 8rem;
        padding-bottom: 8rem;
    }
}

/* ── Gradient Hero ── */
.gradient-hero {
    background: linear-gradient(135deg, #0f2240 0%, #1a3a6b 100%);
}

/* ── Card Hover ── */
.card-hover {
    transition: transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                box-shadow 0.35s ease;
    will-change: transform;
}
.card-hover:hover {
    transform: translateY(-10px) scale(1.01);
    box-shadow: 0 24px 40px -8px rgba(15, 34, 64, 0.18),
                0 8px 16px -4px rgba(200, 151, 61, 0.12);
}

/* ── Image Base ── */
img {
    max-width: 100%;
    height: auto;
}

/* ══════════════════════════════════════
   PAGE TRANSITION OVERLAY
══════════════════════════════════════ */
#page-transition {
    position: fixed;
    inset: 0;
    background: var(--navy);
    z-index: 9999;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.4s ease;
}
#page-transition.active {
    opacity: 1;
    pointer-events: all;
}

/* ══════════════════════════════════════
   SCROLL REVEAL SYSTEM
══════════════════════════════════════ */

/* Base hidden state — applied by JS */
[data-reveal] {
    opacity: 0;
    transition-property: opacity, transform;
    transition-timing-function: cubic-bezier(0.25, 0.46, 0.45, 0.94);
    transition-duration: 0.75s;
    will-change: opacity, transform;
}

[data-reveal="up"]    { transform: translateY(48px); }
[data-reveal="down"]  { transform: translateY(-32px); }
[data-reveal="left"]  { transform: translateX(-48px); }
[data-reveal="right"] { transform: translateX(48px); }
[data-reveal="fade"]  { transform: scale(0.96); }
[data-reveal="zoom"]  { transform: scale(0.88); }

/* Revealed state */
[data-reveal].revealed {
    opacity: 1;
    transform: none;
}

/* Stagger delays for sibling groups */
[data-reveal][data-delay="1"] { transition-delay: 0.1s; }
[data-reveal][data-delay="2"] { transition-delay: 0.2s; }
[data-reveal][data-delay="3"] { transition-delay: 0.3s; }
[data-reveal][data-delay="4"] { transition-delay: 0.4s; }
[data-reveal][data-delay="5"] { transition-delay: 0.5s; }
[data-reveal][data-delay="6"] { transition-delay: 0.6s; }

/* ══════════════════════════════════════
   NAVBAR SCROLL EFFECT
══════════════════════════════════════ */
header {
    transition: height 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease;
}
header.scrolled {
    box-shadow: 0 4px 24px rgba(15, 34, 64, 0.12);
    background-color: rgba(255,255,255,0.98) !important;
}

/* Nav link underline */
nav a.nav-link {
    position: relative;
}
nav a.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gold);
    transition: width 0.3s ease;
}
nav a.nav-link:hover::after,
nav a.nav-link.active::after {
    width: 100%;
}

/* ══════════════════════════════════════
   HERO ENTRANCE ANIMATIONS
══════════════════════════════════════ */
@keyframes heroFadeUp {
    from { opacity: 0; transform: translateY(36px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes heroFadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.hero-animate-1 {
    opacity: 0;
    animation: heroFadeUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.2s forwards;
}
.hero-animate-2 {
    opacity: 0;
    animation: heroFadeUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.45s forwards;
}
.hero-animate-3 {
    opacity: 0;
    animation: heroFadeUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.65s forwards;
}
.hero-animate-4 {
    opacity: 0;
    animation: heroFadeIn 1s ease 0.9s forwards;
}

/* ══════════════════════════════════════
   BUTTON EFFECTS
══════════════════════════════════════ */
.btn-ripple {
    position: relative;
    overflow: hidden;
}
.btn-ripple .ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255,255,255,0.35);
    transform: scale(0);
    animation: rippleAnim 0.55s linear;
    pointer-events: none;
}
@keyframes rippleAnim {
    to { transform: scale(4); opacity: 0; }
}

/* ══════════════════════════════════════
   BACK TO TOP BUTTON
══════════════════════════════════════ */
#back-to-top {
    position: fixed;
    bottom: 6rem;
    right: 1.5rem;
    z-index: 49;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--navy);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(15,34,64,0.25);
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.3s ease, transform 0.3s ease, background-color 0.2s ease;
    pointer-events: none;
}
#back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: all;
}
#back-to-top:hover {
    background: var(--gold);
}
#back-to-top svg {
    width: 20px;
    height: 20px;
}

/* ══════════════════════════════════════
   STATS BAR PULSE
══════════════════════════════════════ */
.stat-counter {
    display: inline-block;
    transition: transform 0.15s ease;
}

/* ══════════════════════════════════════
   FOOTER LINK HOVER
══════════════════════════════════════ */
footer a {
    transition: color 0.25s ease, padding-left 0.25s ease;
}
footer a:hover {
    padding-left: 4px;
}

/* ══════════════════════════════════════
   FORM INPUT FOCUS
══════════════════════════════════════ */
input, select, textarea {
    transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.2s ease !important;
}
input:focus, select:focus, textarea:focus {
    transform: translateY(-1px);
}

/* ══════════════════════════════════════
   IMAGE ZOOM ON HOVER (Product Cards)
══════════════════════════════════════ */
.img-zoom-wrap {
    overflow: hidden;
}
.img-zoom-wrap img {
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.img-zoom-wrap:hover img {
    transform: scale(1.08);
}

/* ══════════════════════════════════════
   GOLD SHIMMER (Decorative)
══════════════════════════════════════ */
@keyframes shimmer {
    0%   { background-position: -200% center; }
    100% { background-position: 200% center; }
}
.gold-shimmer {
    background: linear-gradient(90deg, #c8973d 0%, #f0cf7a 50%, #c8973d 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shimmer 3s linear infinite;
}

/* ══════════════════════════════════════
   PAGE LOAD FADE
══════════════════════════════════════ */
body {
    animation: bodyFadeIn 0.5s ease forwards;
}
@keyframes bodyFadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* ══════════════════════════════════════
   WHATSAPP BUTTON PULSE
══════════════════════════════════════ */
@keyframes waPulse {
    0%   { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.5); }
    70%  { box-shadow: 0 0 0 12px rgba(37, 211, 102, 0); }
    100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}
a[href*="wa.me"] {
    animation: waPulse 2s ease infinite;
}

/* ══════════════════════════════════════
   MOBILE MENU SLIDE
══════════════════════════════════════ */
#mobile-menu {
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                opacity 0.3s ease;
    opacity: 0;
}
#mobile-menu.open {
    max-height: 300px;
    opacity: 1;
}