/* ============================================
   VAULT NUTRITION — Premium Dark Luxury Styles
   ============================================ */

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #0A0F0D;
}

::-webkit-scrollbar-thumb {
    background: #C9A227;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #D4AF37;
}

/* Selection */
::selection {
    background: rgba(201, 162, 39, 0.3);
    color: #F5F0E8;
}

/* ============================================
   GOLD BUTTON
   ============================================ */
.gold-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    background: linear-gradient(135deg, #C9A227 0%, #D4AF37 50%, #C9A227 100%);
    background-size: 200% 200%;
    color: #0A0F0D;
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.gold-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.gold-button:hover::before {
    left: 100%;
}

.gold-button:hover {
    background-position: right center;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(201, 162, 39, 0.3);
}

.gold-button:active {
    transform: translateY(0);
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: #C9A227;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link:hover {
    color: #C9A227 !important;
}

/* Navbar scroll state */
.nav-scrolled {
    background: rgba(10, 15, 13, 0.95) !important;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(201, 162, 39, 0.1);
}

.nav-scrolled .nav-link {
    color: rgba(245, 240, 232, 0.8) !important;
}

/* ============================================
   MOBILE MENU
   ============================================ */
.menu-line {
    display: block;
    transition: all 0.3s ease;
}

#mobile-menu-btn.active .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

#mobile-menu-btn.active .menu-line:nth-child(2) {
    opacity: 0;
}

#mobile-menu-btn.active .menu-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
    width: 1.5rem;
}

.mobile-link {
    position: relative;
}

.mobile-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 1px;
    background: #C9A227;
    transition: width 0.3s ease;
}

.mobile-link:hover::after {
    width: 100%;
}

.mobile-menu-open {
    opacity: 1 !important;
    pointer-events: all !important;
}

/* ============================================
   HERO ANIMATIONS
   ============================================ */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideLeft {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-subtitle {
    animation: slideUp 0.8s ease-out forwards;
}

.hero-headline {
    animation: slideUp 0.8s ease-out forwards;
}

.hero-description {
    animation: slideUp 0.8s ease-out forwards;
}

/* ============================================
   SCROLL REVEAL
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-left.revealed {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(40px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-right.revealed {
    opacity: 1;
    transform: translateX(0);
}

/* Stagger children */
.stagger-children > * {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.stagger-children.revealed > *:nth-child(1) { transition-delay: 0.1s; opacity: 1; transform: translateY(0); }
.stagger-children.revealed > *:nth-child(2) { transition-delay: 0.2s; opacity: 1; transform: translateY(0); }
.stagger-children.revealed > *:nth-child(3) { transition-delay: 0.3s; opacity: 1; transform: translateY(0); }
.stagger-children.revealed > *:nth-child(4) { transition-delay: 0.4s; opacity: 1; transform: translateY(0); }
.stagger-children.revealed > *:nth-child(5) { transition-delay: 0.5s; opacity: 1; transform: translateY(0); }
.stagger-children.revealed > *:nth-child(6) { transition-delay: 0.6s; opacity: 1; transform: translateY(0); }

/* ============================================
   IMAGE HOVER EFFECTS
   ============================================ */
img {
    max-width: 100%;
    height: auto;
}

/* ============================================
   FORM STYLES
   ============================================ */
select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23C9A227' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
}

select option {
    background: #0A0F0D;
    color: #F5F0E8;
}

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */
@media (max-width: 768px) {
    .gold-button {
        padding: 12px 24px;
        font-size: 0.75rem;
    }
    
    .hero-headline {
        font-size: 2.5rem !important;
    }
    
    .hero-description {
        font-size: 1rem !important;
    }
}

@media (max-width: 640px) {
    html {
        font-size: 14px;
    }
}

/* ============================================
   REDUCED MOTION
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}