/**
 * Groupe Kiva - Global White-Minimalist CSS Base
 * Shared spacing system, typography scale, responsive rules for all 9 subdomain sites
 */

/* ========== CSS Custom Properties ========== */
:root {
    /* White Space Scale */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 40px;
    --space-xl: 80px;
    --space-xxl: 120px;
    --section-padding: var(--space-xxl);
    --section-padding-tablet: 80px;
    --section-padding-mobile: 60px;
    --card-padding: var(--space-lg);
    --container-padding: var(--space-lg);

    /* Typography */
    --font-family: 'Poppins', sans-serif;
    --hero-size: 3.5rem;
    --section-title-size: 1.8rem;
    --subtitle-size: 1.2rem;
    --body-size: 1rem;
    --small-size: 0.875rem;
    --line-height: 1.8;
    --font-weight-bold: 700;
    --font-weight-semi: 600;
    --font-weight-normal: 400;
    --letter-spacing: -0.02em;

    /* Brand Accents (overridden per site) */
    --site-accent: #3498db;
    --site-accent-light: #d6eaf8;
    --site-accent-hover: #2980b9;

    /* Backgrounds */
    --bg-primary: #ffffff;
    --bg-secondary: #fafbfc;
    --bg-tertiary: #f5f6f8;

    /* Text */
    --text-primary: #2c3e50;
    --text-secondary: #6c757d;
    --text-muted: #95a5a6;

    /* Borders */
    --border-light: #eef0f2;
    --border-medium: #e1e4e8;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.08);

    /* Functional */
    --success: #27ae60;
    --success-light: #d5f5e3;
    --warning: #f39c12;
    --warning-light: #fef9e7;
    --danger: #e74c3c;
    --danger-light: #fdedec;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

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

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

body {
    background: var(--bg-primary);
    font-family: var(--font-family);
    font-size: var(--body-size);
    line-height: var(--line-height);
    color: var(--text-primary);
    overflow-x: hidden;
    letter-spacing: var(--letter-spacing);
}

/* ========== Typography ========== */
h1, .hero-title {
    font-size: var(--hero-size);
    font-weight: var(--font-weight-bold);
    line-height: 1.15;
    color: var(--text-primary);
}

h2, .section-title {
    font-size: var(--section-title-size);
    font-weight: var(--font-weight-semi);
    line-height: 1.3;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

h3, .card-title {
    font-size: 1.3rem;
    font-weight: var(--font-weight-semi);
    line-height: 1.4;
    color: var(--text-primary);
}

h4 {
    font-size: 1.1rem;
    font-weight: var(--font-weight-semi);
}

p {
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

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

a:hover {
    color: var(--site-accent-hover);
}

.text-accent {
    color: var(--site-accent);
}

.text-muted {
    color: var(--text-muted) !important;
}

/* ========== Layout ========== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.container-narrow {
    max-width: 860px;
}

.section {
    padding: var(--section-padding) var(--space-lg);
    background: var(--bg-primary);
}

.section-alt {
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-xl) auto;
}

.section-header .section-title {
    margin-bottom: var(--space-sm);
}

.section-header .section-subtitle {
    font-size: var(--subtitle-size);
    color: var(--text-secondary);
    font-weight: var(--font-weight-normal);
}

.section-divider {
    width: 60px;
    height: 2px;
    background: var(--site-accent);
    margin: var(--space-md) auto;
    border-radius: 1px;
}

/* ========== Cards ========== */
.card {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--card-padding);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-medium);
}

.card-accent-left {
    border-left: 3px solid var(--site-accent);
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--site-accent-light);
    color: var(--site-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: var(--space-md);
    transition: background var(--transition-fast);
}

.card:hover .card-icon {
    background: var(--site-accent);
    color: #ffffff;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

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

@media (max-width: 1024px) {
    .card-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .card-grid,
    .card-grid-2 {
        grid-template-columns: 1fr;
    }
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 12px 28px;
    font-family: var(--font-family);
    font-size: var(--body-size);
    font-weight: var(--font-weight-semi);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--site-accent);
    color: #ffffff;
}

.btn-primary:hover {
    background: var(--site-accent-hover);
    color: #ffffff;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--site-accent);
    border: 2px solid var(--site-accent);
}

.btn-outline:hover {
    background: var(--site-accent);
    color: #ffffff;
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background: var(--bg-secondary);
    color: var(--site-accent);
}

.btn-sm {
    padding: 8px 18px;
    font-size: var(--small-size);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.1rem;
}

/* ========== Navigation ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-light);
    z-index: 999;
    transition: background var(--transition-fast);
}

.navbar-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    padding: 0 var(--container-padding);
}

.navbar-links {
    display: flex;
    align-items: center;
    list-style: none;
    gap: var(--space-md);
}

.navbar-links a {
    font-size: var(--small-size);
    font-weight: var(--font-weight-semi);
    color: var(--text-secondary);
    padding: 8px 0;
    position: relative;
    transition: color var(--transition-fast);
}

.navbar-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--site-accent);
    transition: width var(--transition-fast);
    border-radius: 1px;
}

.navbar-links a:hover,
.navbar-links a.active {
    color: var(--site-accent);
}

.navbar-links a:hover::after,
.navbar-links a.active::after {
    width: 100%;
}

/* Hamburger */
.burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
}

.burger div {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.burger.active .line1 {
    transform: rotate(45deg) translate(5px, 5px);
}

.burger.active .line2 {
    opacity: 0;
}

.burger.active .line3 {
    transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 768px) {
    .burger {
        display: flex;
    }

    .navbar-links {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: var(--bg-primary);
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-md);
        border-bottom: 1px solid var(--border-light);
        transform: translateY(-100%);
        opacity: 0;
        transition: all var(--transition-normal);
        pointer-events: none;
    }

    .navbar-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
}

/* ========== Hero Section ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    padding: var(--section-padding) var(--space-lg);
    padding-top: calc(72px + var(--space-xl));
    overflow: hidden;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    position: relative;
    z-index: 2;
}

.hero-title {
    margin-bottom: var(--space-md);
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: var(--subtitle-size);
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-canvas {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    opacity: 0.06;
}

/* Scroll indicator */
.scroll-down {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-muted);
    font-size: 1.4rem;
    animation: bounce 2s infinite;
    z-index: 3;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-12px); }
    60% { transform: translateX(-50%) translateY(-6px); }
}

/* Hero dot pattern */
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(var(--border-medium) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.3;
    z-index: 0;
}

/* ========== Features Grid ========== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.feature-item {
    text-align: center;
    padding: var(--card-padding);
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    background: var(--site-accent-light);
    color: var(--site-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto var(--space-md) auto;
    transition: all var(--transition-normal);
}

.feature-item:hover .feature-icon {
    background: var(--site-accent);
    color: #ffffff;
    transform: scale(1.05);
}

.feature-item h3 {
    margin-bottom: var(--space-sm);
    font-size: 1.2rem;
}

.feature-item p {
    color: var(--text-secondary);
    font-size: var(--small-size);
}

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* ========== Service Cards ========== */
.service-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--card-padding);
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    border-color: var(--site-accent-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.service-card .card-image {
    margin: calc(-1 * var(--card-padding));
    margin-bottom: var(--space-md);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    overflow: hidden;
}

.service-card .card-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.service-card:hover .card-image img {
    transform: scale(1.03);
}

.service-card h3 {
    margin-bottom: var(--space-sm);
}

.service-card p {
    color: var(--text-secondary);
    font-size: var(--small-size);
    flex-grow: 1;
}

.service-card .card-footer {
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-light);
}

/* ========== Contact Section ========== */
.contact-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--space-xl);
    align-items: start;
}

.contact-form .form-group {
    margin-bottom: var(--space-md);
}

.contact-form label {
    display: block;
    font-size: var(--small-size);
    font-weight: var(--font-weight-semi);
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 12px 16px;
    font-family: var(--font-family);
    font-size: var(--body-size);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    border-color: var(--site-accent);
    box-shadow: 0 0 0 3px var(--site-accent-light);
}

.contact-form textarea {
    min-height: 140px;
    resize: vertical;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.contact-info .info-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
}

.contact-info .info-item i {
    color: var(--site-accent);
    font-size: 1.2rem;
    margin-top: 2px;
}

.contact-info .info-item p {
    margin: 0;
    color: var(--text-secondary);
    font-size: var(--small-size);
}

.social-media {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}

.social-media a {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.social-media a:hover {
    background: var(--site-accent);
    color: #ffffff;
    border-color: var(--site-accent);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .hero-title {
        font-size: 2.2rem;
    }

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

/* ========== Footer ========== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-light);
    padding: var(--space-xl) var(--space-lg) var(--space-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--space-xl);
    max-width: 1200px;
    margin: 0 auto;
}

.footer-brand {
    font-size: 1.3rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    display: block;
}

.footer-description {
    font-size: var(--small-size);
    color: var(--text-secondary);
    line-height: 1.7;
}

.footer-title {
    font-size: 0.9rem;
    font-weight: var(--font-weight-semi);
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-links a {
    font-size: var(--small-size);
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--site-accent);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-lg);
    margin-top: var(--space-lg);
    border-top: 1px solid var(--border-light);
    font-size: var(--small-size);
    color: var(--text-muted);
}

@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
}

/* ========== Utilities ========== */
.text-center { text-align: center; }
.mt-lg { margin-top: var(--space-xl); }
.mb-lg { margin-bottom: var(--space-xl); }
.mt-md { margin-top: var(--space-md); }
.mb-md { margin-bottom: var(--space-md); }
.hidden { display: none !important; }

/* ========== Preloader ========== */
.preloader {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--border-light);
    border-top-color: var(--site-accent);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

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

/* ========== Glass Panel ========== */
.glass-panel {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
}

/* ========== Animations ========== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========== Scroll Progress ========== */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--site-accent);
    z-index: 10000;
    transition: width 0.1s linear;
}

/* ========== Page Transition ========== */
.page-transition-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: 9998;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.page-transition-overlay.active {
    opacity: 1;
}

/* ========== Typing Effect ========== */
.typing-effect {
    position: relative;
    display: inline-block;
}

.typing-cursor {
    display: inline-block;
    width: 2px;
    height: 1em;
    background: var(--site-accent);
    margin-left: 2px;
    animation: blink 0.8s infinite;
    vertical-align: text-bottom;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* ========== Back to Top ========== */
.back-to-top {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    width: 44px;
    height: 44px;
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 998;
    opacity: 0;
    transform: translateY(10px);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--site-accent);
    color: #ffffff;
    border-color: var(--site-accent);
}

/* ========== Responsive Section Spacing ========== */
@media (max-width: 1024px) {
    :root {
        --section-padding: var(--section-padding-tablet);
        --hero-size: 2.8rem;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: var(--section-padding-mobile);
        --hero-size: 2.2rem;
        --section-title-size: 1.4rem;
        --container-padding: var(--space-md);
    }

    .hero {
        min-height: 90vh;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

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