/*
 * Samsung Ultra-Modern Design System
 * Main CSS - Design tokens, base styles, utilities
 */

/* ===================================
   CSS Custom Properties (Design Tokens)
   Samsung Official Style
   =================================== */
:root {
    /* Oppo Brand Colors - Official Dark Theme */
    --oppo-black: #111111;
    --oppo-green: #1FAD5B;

    /* Neutral Colors */
    --color-black: #000000;
    --color-white: #FFFFFF;
    --color-gray-100: #F8F8F8;
    --color-gray-200: #F4F4F4;
    --color-gray-300: #E5E5E5;
    --color-gray-400: #D1D1D1;
    --color-gray-500: #9E9E9E;
    --color-gray-600: #767676;
    --color-gray-700: #545454;
    --color-gray-800: #333333;
    --color-gray-900: #1A1A1A;

    /* Background Colors */
    --color-bg-primary: #FFFFFF;
    --color-bg-secondary: #F8F8F8;
    --color-bg-dark: #000000;
    --color-bg-gray: #F4F4F4;

    /* Text Colors */
    --color-text-primary: #000000;
    --color-text-secondary: #545454;
    --color-text-muted: #767676;
    --color-text-white: #FFFFFF;

    /* Accent Colors - Xiaomi Official */
    --color-accent-primary: #111111;
    --color-accent-hover: #1FAD5B;
    --color-accent-red: #1FAD5B;

    /* Primary Brand Color */
    --color-primary: #111111;
    --color-primary-hover: #1FAD5B;

    /* Shadows (Samsung Style - subtle) */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;
    --radius-full: 9999px;

    /* Typography - Samsung Fonts */
    --font-oppo: 'Noto Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --font-display: var(--font-oppo);
    --font-body: var(--font-oppo);

    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    --text-7xl: 4.5rem;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 600ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Z-index */
    --z-base: 1;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-overlay: 300;
    --z-modal: 400;
    --z-toast: 500;
}

/* Riduzione spacing su mobile */
@media (max-width: 480px) {
    :root {
        --space-4xl: 3rem;
        --space-3xl: 2.5rem;
        --space-2xl: 2rem;

        --radius-xl: 16px;
        --radius-2xl: 20px;
    }
}

/* Safe Area Support - Android Notch/Punch-hole + Samsung Foldables */
@supports (padding: env(safe-area-inset-left)) {
    .navbar {
        padding-top: env(safe-area-inset-top);
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
    }

    .hero-3d,
    .shop-hero,
    .booking-hero {
        padding-top: max(100px, calc(100px + env(safe-area-inset-top)));
    }

    .container,
    .container-fluid {
        padding-left: max(var(--space-lg), env(safe-area-inset-left));
        padding-right: max(var(--space-lg), env(safe-area-inset-right));
    }

    footer {
        padding-bottom: max(var(--space-xl), env(safe-area-inset-bottom));
    }

    body {
        padding-top: env(safe-area-inset-top);
    }
}

/* Z Fold crease avoidance - unfolded mode */
@media (min-width: 800px) and (max-width: 920px) and (orientation: landscape) {
    .hero-3d-content,
    .booking-container,
    .shop-container {
        padding-left: calc(var(--space-lg) + 40px);
        padding-right: calc(var(--space-lg) + 40px);
    }
}

/* ===================================
   CSS Reset & Base Styles
   =================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    width: 100%;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    overflow-x: hidden;
    position: relative;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
}

h1 { font-size: var(--text-6xl); }
h2 { font-size: var(--text-5xl); }
h3 { font-size: var(--text-4xl); }
h4 { font-size: var(--text-3xl); }
h5 { font-size: var(--text-2xl); }
h6 { font-size: var(--text-xl); }

p {
    margin-bottom: var(--space-md);
}

a {
    color: var(--color-text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

/* Responsive images and media */
img,
video,
iframe {
    max-width: 100%;
    height: auto;
    display: block;
}

svg {
    max-width: 100%;
    height: auto;
}

a:hover {
    color: var(--oppo-green);
}

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

/* ===================================
   Layout Utilities
   =================================== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--space-lg);
}

.section {
    padding: var(--space-4xl) 0;
    position: relative;
}

.section-hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Flexbox Utilities */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

/* ===================================
   Glassmorphism System
   =================================== */
.glass {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    box-shadow: var(--glass-shadow);
}

.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    box-shadow: var(--glass-shadow);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: all var(--transition-bounce);
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left var(--transition-slow);
}

.glass-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 16px 48px 0 rgba(31, 38, 135, 0.5);
    border-color: rgba(255, 255, 255, 0.3);
}

.glass-card:hover::before {
    left: 100%;
}

/* ===================================
   Typography Utilities
   =================================== */
.text-gradient {
    color: var(--oppo-green);
}

.text-gradient-hero {
    color: var(--color-black);
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }

/* ===================================
   Spacing Utilities
   =================================== */
.m-0 { margin: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }

.p-0 { padding: 0; }
.p-sm { padding: var(--space-sm); }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }
.p-xl { padding: var(--space-xl); }

/* ===================================
   Display Utilities
   =================================== */
.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }

/* ===================================
   Position Utilities
   =================================== */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* ===================================
   Responsive Breakpoints
   =================================== */
@media (max-width: 1024px) {
    :root {
        --text-6xl: 3rem;
        --text-5xl: 2.5rem;
        --text-4xl: 2rem;
    }

    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .section {
        padding: var(--space-3xl) 0;
    }
}

@media (max-width: 768px) {
    :root {
        --text-6xl: 2.5rem;
        --text-5xl: 2rem;
        --text-4xl: 1.75rem;
        --space-4xl: 3rem;
    }

    .container,
    .container-fluid {
        padding: 0 var(--space-md);
    }

    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }

    .section {
        padding: var(--space-2xl) 0;
    }

    h1 { font-size: var(--text-5xl); }
    h2 { font-size: var(--text-4xl); }
}

/* Galaxy Z Fold FOLDED - 280px ultra-narrow */
@media (max-width: 320px) {
    html {
        font-size: 14px;
    }

    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }

    .section {
        padding: var(--space-xl) var(--space-sm);
    }

    .glass-card {
        padding: var(--space-md);
    }
}

/* Galaxy S - 360px */
@media (min-width: 360px) {
    html {
        font-size: 15px;
    }

    h1 { font-size: clamp(2rem, 5vw, var(--text-6xl)); }
    h2 { font-size: clamp(1.75rem, 4vw, var(--text-5xl)); }
    h3 { font-size: clamp(1.5rem, 3.5vw, var(--text-4xl)); }
}

/* Honor V5, Pixel 5/6/7, OnePlus Nord - 393px */
@media (min-width: 393px) {
    html {
        font-size: 15.5px;
    }

    body {
        line-height: 1.7;
    }

    h1 { font-size: clamp(2.25rem, 5.5vw, var(--text-6xl)); }
    h2 { font-size: clamp(2rem, 4.5vw, var(--text-5xl)); }
    h3 { font-size: clamp(1.625rem, 4vw, var(--text-4xl)); }

    p {
        font-size: 1.0625rem;
        line-height: 1.75;
    }
}

/* Pixel 3/4, mid-range Android - 412px */
@media (min-width: 412px) {
    html {
        font-size: 15.75px;
    }
}

@media (min-width: 480px) {
    html {
        font-size: 16px;
    }

    .glass-card {
        padding: var(--space-lg);
    }
}

/* Mobile readability improvements - Honor V5, Android devices */
@media (max-width: 768px) {
    body {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        text-rendering: optimizeLegibility;
    }

    h1, h2, h3, h4, h5, h6 {
        font-weight: 800;
        letter-spacing: -0.02em;
    }

    p, li, span {
        font-weight: 400;
        letter-spacing: 0.01em;
    }

    a {
        font-weight: 500;
    }

    .btn {
        font-weight: 600;
        letter-spacing: 0.02em;
    }

    /* Increase contrast for outdoor visibility */
    .glass-card,
    .product-card,
    .service-card {
        background: #FFFFFF;
        border-color: #D1D1D1;
    }

    /* Prevent horizontal overflow - ALL mobile devices */
    .container,
    .container-fluid {
        width: 100%;
        max-width: 100vw;
        padding: 0 var(--space-md);
        box-sizing: border-box;
        overflow-x: hidden;
    }

    .section {
        width: 100%;
        max-width: 100vw;
        overflow-x: hidden;
        box-sizing: border-box;
    }

    /* Fix all potential overflow sources */
    img,
    video,
    iframe,
    .hero-3d,
    .shop-hero,
    .booking-hero {
        max-width: 100%;
        box-sizing: border-box;
    }

    /* Grid responsive */
    .grid {
        width: 100%;
        box-sizing: border-box;
    }
}

/* Landscape optimization - Galaxy S landscape */
@media (max-height: 500px) and (orientation: landscape) {
    .section {
        padding: var(--space-xl) 0;
    }

    .hero-3d {
        min-height: auto;
        padding: var(--space-3xl) 0;
    }

    .navbar {
        padding: var(--space-xs) 0;
    }

    .navbar-nav {
        overflow-y: auto;
    }
}

/* Chrome Android - Dynamic Viewport Height Support */
@supports (height: 100dvh) {
    .hero-3d,
    .shop-hero,
    .booking-hero {
        min-height: 100dvh;
    }

    @media (max-width: 768px) {
        .navbar-nav {
            height: 100dvh;
            max-height: 100dvh;
        }
    }
}

/* Android Gesture Navigation Bar - Bottom spacing */
@media (max-width: 768px) {
    footer {
        padding-bottom: max(var(--space-xl), 24px);
    }

    .navbar-nav {
        padding-bottom: max(var(--space-2xl), 24px);
    }

    /* Fixed bottom CTAs (se presenti) */
    .fixed-bottom-cta {
        bottom: max(var(--space-lg), 24px);
    }
}

/* ===================================
   Animations Base
   =================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.animate-fadeIn {
    animation: fadeIn var(--transition-base) ease-out;
}

.animate-slideUp {
    animation: slideUp var(--transition-slow) ease-out;
}

/* ===================================
   Accessibility
   =================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

:focus-visible {
    outline: 2px solid var(--color-neon-blue);
    outline-offset: 2px;
}

/* ===================================
   Print Styles
   =================================== */
@media print {
    body {
        background: white;
        color: black;
    }

    .no-print {
        display: none !important;
    }
}