/* ============================
   VARIABLES
   ============================ */
:root {
    --gold: #c9a84c;
    --gold-light: #e0c76a;
    --gold-dark: #a88a2e;
    --dark: #0f0f13;
    --dark-2: #16161c;
    --dark-3: #1e1e26;
    --dark-4: #282832;
    --white: #ffffff;
    --text: #d0cdc5;
    --text-muted: rgba(255,255,255,0.55);
    --text-faint: rgba(255,255,255,0.35);
    --border: rgba(255,255,255,0.07);
    --border-gold: rgba(201,168,76,0.2);
    --font: 'Inter', -apple-system, sans-serif;
    --font-d: 'Playfair Display', Georgia, serif;
    --radius: 16px;
    --radius-sm: 10px;
    --radius-full: 9999px;
    --tr: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow: 0 20px 60px rgba(0,0,0,0.35);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font);
    background: var(--dark);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--tr);
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

ul, ol { list-style: none; }
img { max-width: 100%; display: block; }

/* ============================
   UTILITY
   ============================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 clamp(16px, 4vw, 40px);
}

.section {
    padding: clamp(60px, 10vw, 100px) 0;
}

.section--alt {
    background: var(--dark-2);
}

/* ============================
   BUTTONS
   ============================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 36px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--tr);
    cursor: pointer;
    white-space: nowrap;
}

.btn svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    transition: transform var(--tr);
}

.btn:hover svg {
    transform: translateX(3px);
}

.btn--gold {
    background: linear-gradient(135deg, var(--gold), var(--gold-dark));
    color: var(--dark);
    box-shadow: 0 4px 25px rgba(201,168,76,0.3);
}

.btn--gold:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 35px rgba(201,168,76,0.5);
}

.btn--outline {
    border: 2px solid rgba(201,168,76,0.35);
    color: var(--gold);
}

.btn--outline:hover {
    background: rgba(201,168,76,0.1);
    border-color: var(--gold);
}

.btn--tg {
    background: #2AABEE;
    color: #fff;
}

.btn--tg:hover {
    background: #1d96d1;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(42,171,238,0.3);
}

.btn--wa {
    background: #25D366;
    color: #fff;
}

.btn--wa:hover {
    background: #1eb854;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37,211,102,0.3);
}

.btn--lg {
    padding: 20px 48px;
    font-size: 16px;
}

/* ============================
   SECTION HEADERS
   ============================ */
.sh {
    margin-bottom: clamp(36px, 6vw, 56px);
}

.sh--c {
    text-align: center;
}

.sh__label {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 14px;
}

.sh__label::before {
    content: '';
    width: 30px;
    height: 2px;
    background: var(--gold);
}

.sh__title {
    font-family: var(--font-d);
    font-size: clamp(28px, 4.5vw, 48px);
    font-weight: 600;
    color: var(--white);
    line-height: 1.15;
    margin-bottom: 14px;
}

.sh__title em {
    font-style: italic;
    color: var(--gold);
}

.sh__desc {
    font-size: clamp(15px, 1.5vw, 17px);
    color: var(--text-muted);
    max-width: 560px;
    line-height: 1.7;
}

.sh--c .sh__desc {
    margin: 0 auto;
}
/* ============================
   HEADER
   ============================ */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    padding: 18px 0;
    transition: all var(--tr);
}

.header.scrolled {
    background: rgba(15,15,19,0.92);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    z-index: 1001;
    display: flex;
    align-items: center;
    font-family: var(--font-d);
    font-size: 26px;
    font-weight: 700;
    letter-spacing: 2px;
    cursor: pointer;
}

.logo__da { color: var(--gold); }
.logo__vi { color: var(--white); }

.nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav__link {
    font-size: 13px;
    font-weight: 500;
    color: rgba(255,255,255,0.65);
    padding: 8px 14px;
    border-radius: var(--radius-full);
    transition: all var(--tr);
    cursor: pointer;
}

.nav__link:hover {
    color: var(--white);
    background: rgba(255,255,255,0.07);
}

.nav__link.active {
    color: var(--gold);
    background: rgba(201,168,76,0.08);
}

/* Header socials */
.h-socials {
    display: flex;
    gap: 8px;
}

.soc {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--tr);
}

.soc svg {
    width: 18px;
    height: 18px;
    fill: rgba(255,255,255,0.6);
    transition: fill var(--tr);
}

.soc:hover {
    border-color: var(--gold);
    background: rgba(201,168,76,0.1);
}

.soc:hover svg {
    fill: var(--gold);
}

/* ============================
   MOBILE MENU
   ============================ */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    width: 28px;
    z-index: 1001;
    padding: 6px 0;
}

.menu-toggle span {
    display: block;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: all var(--tr);
    transform-origin: center;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5.5px, 5.5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5.5px, -5.5px);
}

.mob-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15,15,19,0.97);
    backdrop-filter: blur(20px);
    z-index: 999;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.mob-overlay.active {
    display: flex;
}

.mob-nav {
    text-align: center;
}

.mob-nav a {
    display: block;
    font-size: 20px;
    font-weight: 500;
    color: rgba(255,255,255,0.7);
    padding: 14px 30px;
    border-radius: var(--radius-sm);
    transition: all var(--tr);
    cursor: pointer;
}

.mob-nav a:hover,
.mob-nav a.active {
    color: var(--gold);
    background: rgba(201,168,76,0.08);
}

.mob-socials {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 28px;
}

/* ============================
   PAGE SYSTEM
   ============================ */
.page {
    display: none;
    animation: pageIn 0.4s ease-out;
}

.page.active {
    display: block;
}

@keyframes pageIn {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============================
   ANIMATIONS
   ============================ */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(28px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

@keyframes shapeFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -30px) scale(1.05); }
}

@keyframes cardFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* ============================
   FOOTER
   ============================ */
.footer {
    background: var(--dark-2);
    border-top: 1px solid var(--border);
    padding: 40px 0 24px;
}

.footer__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
}

.footer__copy {
    font-size: 13px;
    color: var(--text-faint);
}

.footer__socials {
    display: flex;
    gap: 10px;
}

.footer-seo {
    width: 100%;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.footer-seo__summary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 160px;
    padding: 12px 28px;
    font-family: var(--font-r, 'Raleway', sans-serif);
    font-size: 15px;
    font-weight: 600;
    color: var(--gold, #c9a84c);
    background: rgba(201, 168, 76, 0.08);
    border: 1px solid rgba(201, 168, 76, 0.35);
    border-radius: 50px;
    cursor: pointer;
    list-style: none;
    transition: background 0.25s ease, border-color 0.25s ease;
}

.footer-seo__summary::-webkit-details-marker {
    display: none;
}

.footer-seo__summary::marker {
    content: '';
}

.footer-seo__details .footer-seo__summary:hover {
    background: rgba(201, 168, 76, 0.14);
    border-color: rgba(201, 168, 76, 0.55);
}

.footer-seo__body {
    margin-top: 20px;
    padding-top: 4px;
}

.footer-seo__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 20px 28px;
    font-size: 13px;
}

.footer-seo__title {
    color: var(--gold);
    font-weight: 600;
    margin-bottom: 10px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.footer-seo__list {
    list-style: none;
}

.footer-seo__list li {
    margin-bottom: 6px;
}

.footer-seo__list a {
    color: rgba(255, 255, 255, 0.55);
    text-decoration: none;
    transition: color var(--tr);
}

.footer-seo__list a:hover {
    color: var(--gold);
}