/* ==========================================================================
   HŰTŐKÖR DESIGN SYSTEM — iOS Liquid Glass
   ========================================================================== */

/* --------------------------------------------------------------------------
   0. Design Tokens
   -------------------------------------------------------------------------- */
:root {
    /* Glass surfaces */
    --glass-bg: rgba(255, 255, 255, 0.62);
    --glass-bg-strong: rgba(244, 248, 251, 0.82);
    --glass-bg-dark: rgba(15, 58, 92, 0.55);
    --glass-border-light: rgba(255, 255, 255, 0.55);
    --glass-border: rgba(255, 255, 255, 0.28);
    --glass-border-tint: rgba(27, 110, 168, 0.18);
    --glass-highlight: inset 0 1px 0 rgba(255, 255, 255, 0.65);
    --glass-shadow:
        0 4px 6px -1px rgba(15, 58, 92, 0.06),
        0 12px 32px -8px rgba(15, 58, 92, 0.14),
        0 0 0 0.5px rgba(255, 255, 255, 0.08);
    --glass-shadow-elevated:
        0 8px 16px -4px rgba(15, 58, 92, 0.1),
        0 24px 48px -12px rgba(15, 58, 92, 0.18),
        0 0 0 0.5px rgba(255, 255, 255, 0.12);
    --glass-blur: 28px;
    --glass-blur-heavy: 40px;
    --glass-saturate: 180%;

    /* Motion — iOS spring curves */
    --ease-spring: cubic-bezier(0.34, 1.45, 0.64, 1);
    --ease-spring-soft: cubic-bezier(0.22, 1, 0.36, 1);
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --duration-fast: 0.25s;
    --duration-normal: 0.45s;
    --duration-slow: 0.7s;

    /* Brand */
    --steel-900: #0F3A5C;
    --steel-600: #1B6FA8;
    --signal-500: #F2A900;

    /* Fixed pill header clearance — used to offset hero content on mobile */
    --header-offset: 0px;
}

@media (max-width: 767px) {
    :root {
        /* top-6 (1.5rem) + nav pill (~4.5rem) + gap (0.75rem) */
        --header-offset: calc(1.5rem + 4.5rem + 0.75rem);
    }
}

/* First hero panel: content starts below header; image/overlay stay full-bleed */
@media (max-width: 767px) {
    .hero-panel-first {
        justify-content: flex-start;
        padding-top: var(--header-offset);
    }
}

/* --------------------------------------------------------------------------
   1. Base & Accessibility
   -------------------------------------------------------------------------- */
html {
    scroll-behavior: smooth;
}

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

    .reveal,
    .reveal-stagger > * {
        opacity: 1 !important;
        transform: none !important;
    }
}

/* --------------------------------------------------------------------------
   2. Brand Utilities & Focus Rings
   -------------------------------------------------------------------------- */
.focus-ring-signal:focus-visible {
    outline: 3px solid var(--signal-500);
    outline-offset: 3px;
    border-radius: inherit;
}

.blue-desat-img {
    filter: grayscale(100%) contrast(108%) brightness(82%) saturate(90%);
    transition: transform var(--duration-slow) var(--ease-out-expo),
                filter var(--duration-normal) ease;
}

.group:hover .blue-desat-img {
    filter: grayscale(85%) contrast(112%) brightness(88%) saturate(105%);
}

.text-shadow-heavy {
    text-shadow:
        0 2px 12px rgba(0, 0, 0, 0.5),
        0 1px 4px rgba(0, 0, 0, 0.35);
}

.text-shadow-glass {
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.25);
}

/* --------------------------------------------------------------------------
   3. Liquid Glass Surfaces
   -------------------------------------------------------------------------- */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow), var(--glass-highlight);
}

.glass-strong {
    background: var(--glass-bg-strong);
    backdrop-filter: blur(var(--glass-blur-heavy)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur-heavy)) saturate(var(--glass-saturate));
    border: 1px solid var(--glass-border-light);
    box-shadow: var(--glass-shadow-elevated), var(--glass-highlight);
}

.glass-dark {
    background: var(--glass-bg-dark);
    backdrop-filter: blur(var(--glass-blur)) saturate(160%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow:
        0 8px 32px rgba(0, 0, 0, 0.25),
        inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

/* Pill header — primary navigation glass */
.glass-header {
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.78) 0%,
        rgba(244, 248, 251, 0.65) 50%,
        rgba(255, 255, 255, 0.72) 100%
    );
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    border: 1px solid var(--glass-border-light);
    box-shadow: var(--glass-shadow-elevated), var(--glass-highlight);
    transition:
        transform var(--duration-normal) var(--ease-spring-soft),
        opacity var(--duration-normal) ease,
        box-shadow var(--duration-fast) ease;
}

.glass-header:hover {
    box-shadow:
        0 8px 20px -4px rgba(15, 58, 92, 0.12),
        0 28px 56px -16px rgba(15, 58, 92, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.header-hidden {
    transform: translateY(calc(-100% - 2rem));
    opacity: 0;
    pointer-events: none;
}

/* Glass CTA buttons */
.glass-cta {
    background: linear-gradient(
        180deg,
        rgba(252, 211, 77, 1) 0%,
        rgba(242, 169, 0, 1) 100%
    );
    border: 1px solid rgba(255, 255, 255, 0.45);
    box-shadow:
        0 4px 14px rgba(242, 169, 0, 0.35),
        inset 0 1px 0 rgba(255, 255, 255, 0.55);
    transition:
        transform var(--duration-fast) var(--ease-spring),
        box-shadow var(--duration-fast) ease,
        background var(--duration-fast) ease;
}

.glass-cta:hover {
    background: linear-gradient(
        180deg,
        rgba(253, 224, 120, 1) 0%,
        rgba(252, 211, 77, 1) 100%
    );
    box-shadow:
        0 8px 24px rgba(242, 169, 0, 0.45),
        inset 0 1px 0 rgba(255, 255, 255, 0.65);
    transform: translateY(-2px) scale(1.02);
}

.glass-cta:active {
    transform: translateY(0) scale(0.98);
    box-shadow:
        0 2px 8px rgba(242, 169, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

/* Glass phone / action pill */
.glass-pill {
    background: linear-gradient(
        180deg,
        rgba(27, 111, 168, 0.95) 0%,
        rgba(15, 58, 92, 0.98) 100%
    );
    backdrop-filter: blur(12px) saturate(150%);
    -webkit-backdrop-filter: blur(12px) saturate(150%);
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow:
        0 4px 16px rgba(15, 58, 92, 0.35),
        inset 0 1px 0 rgba(255, 255, 255, 0.12);
    transition:
        transform var(--duration-fast) var(--ease-spring),
        box-shadow var(--duration-fast) ease,
        background var(--duration-fast) ease;
}

.glass-pill:hover {
    background: linear-gradient(
        180deg,
        rgba(95, 174, 222, 0.9) 0%,
        rgba(27, 111, 168, 0.95) 100%
    );
    box-shadow:
        0 8px 24px rgba(15, 58, 92, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.18);
    transform: translateY(-1px);
}

/* Hero content glass card overlay */
.glass-hero-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(16px) saturate(140%);
    -webkit-backdrop-filter: blur(16px) saturate(140%);
    border: 1px solid rgba(255, 255, 255, 0.18);
    box-shadow:
        0 8px 32px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.12);
    border-radius: 1.75rem;
    padding: 2rem 2.25rem;
    transition:
        background var(--duration-normal) ease,
        border-color var(--duration-normal) ease,
        transform var(--duration-normal) var(--ease-spring-soft),
        box-shadow var(--duration-normal) ease;
}

.group:hover .glass-hero-card {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.28);
    transform: translateY(-4px);
    box-shadow:
        0 16px 48px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

/* Panel gradient overlay — richer depth */
.glass-panel-overlay {
    background: linear-gradient(
        165deg,
        rgba(15, 58, 92, 0.55) 0%,
        rgba(15, 58, 92, 0.72) 45%,
        rgba(15, 58, 92, 0.82) 100%
    );
    transition: background var(--duration-normal) ease;
}

.glass-panel-overlay--electric {
    background: linear-gradient(
        165deg,
        rgba(27, 111, 168, 0.5) 0%,
        rgba(27, 111, 168, 0.68) 45%,
        rgba(15, 58, 92, 0.78) 100%
    );
}

.group:hover .glass-panel-overlay {
    background: linear-gradient(
        165deg,
        rgba(15, 58, 92, 0.62) 0%,
        rgba(15, 58, 92, 0.78) 45%,
        rgba(15, 58, 92, 0.88) 100%
    );
}

.group:hover .glass-panel-overlay--electric {
    background: linear-gradient(
        165deg,
        rgba(27, 111, 168, 0.58) 0%,
        rgba(27, 111, 168, 0.76) 45%,
        rgba(15, 58, 92, 0.85) 100%
    );
}

/* --------------------------------------------------------------------------
   4. Navigation
   -------------------------------------------------------------------------- */
.nav-link {
    position: relative;
    transition: color var(--duration-fast) ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--steel-600), transparent);
    border-radius: 2px;
    transition: width var(--duration-normal) var(--ease-spring-soft);
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
    width: 85%;
}

/* --------------------------------------------------------------------------
   5. Mobile Menu
   -------------------------------------------------------------------------- */
#mobile-menu {
    background: linear-gradient(
        160deg,
        rgba(255, 255, 255, 0.92) 0%,
        rgba(244, 248, 251, 0.88) 100%
    );
    backdrop-filter: blur(var(--glass-blur-heavy)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur-heavy)) saturate(var(--glass-saturate));
    border: 1px solid var(--glass-border-light);
    box-shadow: var(--glass-shadow-elevated), var(--glass-highlight);
    transition:
        transform var(--duration-normal) var(--ease-spring-soft),
        opacity var(--duration-normal) ease;
    transform: translateY(-12px) scale(0.97);
    opacity: 0;
    pointer-events: none;
    transform-origin: top center;
}

#mobile-menu.active {
    transform: translateY(0) scale(1);
    opacity: 1;
    pointer-events: auto;
}

#mobile-menu a {
    transition:
        background var(--duration-fast) ease,
        transform var(--duration-fast) var(--ease-spring);
}

#mobile-menu a:active {
    transform: scale(0.98);
}

/* --------------------------------------------------------------------------
   6. Footer Glass Bar
   -------------------------------------------------------------------------- */
.glass-footer {
    background: linear-gradient(
        180deg,
        rgba(15, 58, 92, 0.97) 0%,
        rgba(11, 42, 66, 1) 100%
    );
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* Sticky mobile CTA — liquid glass dark */
.glass-mobile-cta {
    background: linear-gradient(
        165deg,
        rgba(27, 111, 168, 0.88) 0%,
        rgba(15, 58, 92, 0.94) 100%
    );
    backdrop-filter: blur(20px) saturate(160%);
    -webkit-backdrop-filter: blur(20px) saturate(160%);
    border: 1px solid rgba(252, 211, 77, 0.25);
    box-shadow:
        0 8px 32px rgba(15, 58, 92, 0.45),
        inset 0 1px 0 rgba(255, 255, 255, 0.12);
    transition:
        transform var(--duration-fast) var(--ease-spring),
        box-shadow var(--duration-fast) ease;
}

.glass-mobile-cta:active {
    transform: scale(0.97);
}

/* --------------------------------------------------------------------------
   7. Entrance & Scroll Animations
   -------------------------------------------------------------------------- */
@keyframes fade-up {
    from {
        opacity: 0;
        transform: translateY(28px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fade-down {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scale-in {
    from {
        opacity: 0;
        transform: scale(0.94);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

/* Page load sequence */
.animate-header-enter {
    animation: fade-down var(--duration-normal) var(--ease-spring-soft) both;
}

.animate-panel-left {
    animation: fade-in var(--duration-slow) var(--ease-out-expo) both;
}

.animate-panel-right {
    animation: fade-in var(--duration-slow) var(--ease-out-expo) 0.12s both;
}

/* Stagger children inside hero cards */
.reveal-stagger > * {
    opacity: 0;
    transform: translateY(24px);
    transition:
        opacity var(--duration-normal) var(--ease-out-expo),
        transform var(--duration-normal) var(--ease-spring-soft);
}

.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0.05s; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 0.12s; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 0.19s; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 0.26s; }

.reveal-stagger.is-visible > * {
    opacity: 1;
    transform: translateY(0);
}

/* Scroll-triggered reveals */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition:
        opacity var(--duration-normal) var(--ease-out-expo),
        transform var(--duration-normal) var(--ease-spring-soft);
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Panel hover lift */
.hero-panel {
    transition: flex var(--duration-slow) var(--ease-spring-soft);
}

.hero-panel::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(
        ellipse 80% 60% at 50% 100%,
        rgba(255, 255, 255, 0.08) 0%,
        transparent 70%
    );
    opacity: 0;
    transition: opacity var(--duration-normal) ease;
    pointer-events: none;
    z-index: 5;
}

.hero-panel:hover::before {
    opacity: 1;
}

/* Divider between panels — subtle glass line */
.glass-divider {
    background: linear-gradient(
        180deg,
        transparent,
        rgba(255, 255, 255, 0.35) 50%,
        transparent
    );
    width: 1px;
}

/* --------------------------------------------------------------------------
   8. Icon Animations
   -------------------------------------------------------------------------- */
@keyframes buzz {
    0%, 100% { transform: rotate(0deg); }
    2%, 6% { transform: rotate(-14deg); }
    4% { transform: rotate(11deg); }
    8% { transform: rotate(-9deg); }
    10% { transform: rotate(8deg); }
    12%, 98% { transform: rotate(0deg); }
}

.buzz-icon {
    animation: buzz 4s ease-in-out infinite;
    display: inline-block;
    transform-origin: center;
}

@keyframes container-buzz {
    0%, 90%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    91%, 95%, 99% {
        transform: translate(-1.5px, 1px) rotate(-0.5deg);
    }
    93%, 97% {
        transform: translate(1.5px, -1px) rotate(0.5deg);
    }
}

.animate-buzz-container {
    animation: container-buzz 5s ease-in-out infinite;
    will-change: transform;
}

/* Arrow slide on CTA hover */
.cta-arrow {
    transition: transform var(--duration-fast) var(--ease-spring);
}

.group:hover .cta-arrow {
    transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   9. Menu Toggle Animation
   -------------------------------------------------------------------------- */
#menu-toggle {
    transition:
        background var(--duration-fast) ease,
        transform var(--duration-fast) var(--ease-spring);
}

#menu-toggle:active {
    transform: scale(0.92);
}

#menu-toggle:hover {
    background: rgba(27, 110, 168, 0.08);
}