/* ========================================
   369 Studio — Design System & Styles
   ======================================== */

/* CSS Custom Properties */
:root {
    --color-pink: #E91E63;
    --color-pink-dark: #C2185B;
    --color-orange: #E65100;
    --color-orange-light: #FF8F00;
    --color-black: #000000;
    --color-white: #FFFFFF;
    --color-gray-100: #F8F9FA;
    --color-gray-200: #E8ECF0;
    --color-gray-600: #6B7280;
    --color-gray-800: #1F2937;

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --max-width: 1400px;
    --header-height: 64px;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --shadow-card: 0 2px 8px rgba(0,0,0,0.06);

    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    color: var(--color-gray-800);
    background: var(--color-white);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   Header
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
}

.logo:hover {
    opacity: 0.85;
}

.logo-img {
    width: 36px;
    height: 36px;
    border-radius: 8px;
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--color-pink);
    letter-spacing: -0.5px;
    font-style: italic;
}

.nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-gray-800);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    letter-spacing: 0.5px;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-pink);
}

.nav-link.active {
    border-bottom: 2px solid var(--color-pink);
    border-radius: 0;
    padding-bottom: 6px;
}

.btn-contact {
    background: var(--color-pink);
    color: var(--color-white) !important;
    border-radius: var(--radius-sm);
    padding: 8px 20px;
}

.btn-contact:hover {
    background: var(--color-pink-dark);
    transform: translateY(-1px);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-gray-800);
    border-radius: 2px;
    transition: var(--transition);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    padding: 120px 0 40px;
    text-align: center;
    background: var(--color-white);
}

.hero-title {
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--color-black);
    margin-bottom: 16px;
}

.hero-stats {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--color-gray-800);
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.stat-item {
    white-space: nowrap;
}

.stat-number {
    color: var(--color-orange);
    font-weight: 800;
    font-size: 1.1em;
}

.stat-divider {
    margin: 0 4px;
    color: var(--color-gray-200);
}

/* ========================================
   App Showcase — Image-based grid
   ======================================== */
.app-showcase {
    padding: 0;
}

.showcase-row {
    display: grid;
    gap: 0;
}

.showcase-row--half {
    grid-template-columns: 1fr 1fr;
}

.showcase-row--quarter {
    grid-template-columns: 1fr 1fr 1fr 1fr;
}

.showcase-cell {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 24px;
    min-height: 420px;
    overflow: hidden;
    transition: var(--transition);
}

.showcase-cell:hover {
    filter: brightness(1.02);
}

.showcase-img {
    max-width: 100%;
    max-height: 400px;
    object-fit: contain;
    transition: transform 0.4s ease;
}

.showcase-cell:hover .showcase-img {
    transform: scale(1.03);
}

/* Row 2 (quarter) cells are taller for single phones */
.showcase-row--quarter .showcase-cell {
    min-height: 480px;
    padding: 60px 16px;
}

.showcase-row--quarter .showcase-img {
    max-height: 420px;
}

/* ========================================
   About Section
   ======================================== */
.about {
    padding: 80px 0;
    background: var(--color-gray-100);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-img {
    max-width: 400px;
    width: 100%;
    margin: 0 auto;
}

.about-title {
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 900;
    letter-spacing: 1px;
    color: var(--color-black);
    margin-bottom: 24px;
}

.about-list {
    list-style: disc;
    padding-left: 24px;
    margin-bottom: 24px;
}

.about-list li {
    font-size: 1.05rem;
    color: var(--color-gray-800);
    margin-bottom: 8px;
    line-height: 1.7;
}

.about-desc {
    font-size: 1.1rem;
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* ========================================
   Scroll Indicator
   ======================================== */
.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 0;
    background: var(--color-gray-100);
}

.scroll-icon {
    width: 24px;
    height: 40px;
    border: 2px solid var(--color-gray-800);
    border-radius: 12px;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 6px;
    margin-bottom: 8px;
}

.scroll-dot {
    width: 4px;
    height: 8px;
    background: var(--color-gray-800);
    border-radius: 2px;
    animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateY(0); opacity: 1; }
    50% { transform: translateY(12px); opacity: 0.3; }
}

.scroll-arrow {
    font-size: 0.8rem;
    color: var(--color-gray-800);
    animation: arrowBounce 2s ease-in-out infinite;
}

@keyframes arrowBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(4px); }
}

/* ========================================
   Reviews Section
   ======================================== */
.reviews {
    padding: 80px 0;
    background: linear-gradient(180deg, var(--color-gray-100) 0%, var(--color-white) 100%);
}

.reviews-title {
    text-align: center;
    font-size: clamp(1.2rem, 2.2vw, 1.8rem);
    font-weight: 800;
    letter-spacing: 1px;
    color: var(--color-black);
    margin-bottom: 48px;
    line-height: 1.4;
}

.text-orange {
    color: var(--color-orange-light);
}

.text-pink {
    color: var(--color-pink);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.review-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    padding: 28px 20px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-card);
}

.review-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.review-text {
    font-size: 0.92rem;
    color: var(--color-gray-800);
    margin-bottom: 16px;
    line-height: 1.5;
}

.stars {
    font-size: 1.2rem;
    color: #FFB300;
    letter-spacing: 2px;
}

/* ========================================
   Partnership Section
   ======================================== */
.partnership {
    padding: 80px 0;
    background: var(--color-gray-100);
    text-align: center;
}

.partnership-badge {
    display: inline-block;
    background: var(--color-black);
    color: var(--color-white);
    padding: 12px 36px;
    border-radius: var(--radius-full);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

.partnership-subtitle {
    font-size: 1rem;
    color: var(--color-gray-600);
    margin-bottom: 48px;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 32px 24px;
    max-width: 900px;
    margin: 0 auto;
}

.partner-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
}

.partner-logo:hover {
    transform: scale(1.08);
}

.partner-logo img {
    width: 64px;
    height: 64px;
    object-fit: contain;
    filter: grayscale(10%);
    transition: var(--transition);
}

.partner-logo:hover img {
    filter: grayscale(0%);
}

.partner-logo span {
    font-size: 0.75rem;
    color: var(--color-gray-600);
    font-weight: 500;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--color-black);
    color: var(--color-white);
    padding: 60px 0;
    text-align: center;
}

.footer-logo {
    font-size: 1.8rem;
    font-weight: 900;
    margin-bottom: 16px;
    letter-spacing: 2px;
}

.footer-email {
    font-size: 1rem;
    margin-bottom: 12px;
    opacity: 0.8;
}

.footer-address {
    font-size: 0.9rem;
    opacity: 0.6;
}

/* ========================================
   Back to Top
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--color-gray-800);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--color-gray-800);
    color: var(--color-white);
    transform: translateY(-2px);
}

/* ========================================
   Animations
   ======================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .showcase-row--half {
        grid-template-columns: 1fr 1fr;
    }

    .showcase-row--quarter {
        grid-template-columns: 1fr 1fr;
    }

    .showcase-cell {
        min-height: 350px;
        padding: 30px 16px;
    }

    .showcase-row--quarter .showcase-cell {
        min-height: 400px;
    }

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

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

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: var(--header-height);
        right: -100%;
        width: 280px;
        height: calc(100vh - var(--header-height));
        background: var(--color-white);
        flex-direction: column;
        padding: 24px;
        gap: 4px;
        box-shadow: -4px 0 20px rgba(0,0,0,0.1);
        transition: var(--transition);
    }

    .nav.open {
        right: 0;
    }

    .nav-link {
        width: 100%;
        padding: 12px 16px;
        border-radius: var(--radius-sm);
    }

    .nav-link.active {
        border-bottom: none;
        background: rgba(233, 30, 99, 0.08);
        border-radius: var(--radius-sm);
        padding: 12px 16px;
    }

    .btn-contact {
        text-align: center;
    }

    .mobile-toggle {
        display: flex;
    }

    .mobile-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(4px, 4px);
    }

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

    .mobile-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(4px, -4px);
    }

    .hero {
        padding: 100px 0 30px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 4px;
    }

    .stat-divider {
        display: none;
    }

    .showcase-row--half,
    .showcase-row--quarter {
        grid-template-columns: 1fr;
    }

    .showcase-cell {
        min-height: 300px;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .about-list {
        text-align: left;
    }

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

    .partners-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
}

@media (max-width: 480px) {
    .reviews-grid {
        grid-template-columns: 1fr;
    }

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

    .hero-title {
        font-size: 1.5rem;
    }

    .about-title {
        font-size: 1.5rem;
    }

    .reviews-title {
        font-size: 1rem;
    }
}