/* =====================================================
   GCABU - Global Coffee & Barista Union
   Premium English-Only Stylesheet
   ===================================================== */

/* CSS Variables */
:root {
    /* Coffee-inspired color palette */
    --primary-brown: #5D4037;
    --medium-brown: #795548;
    --light-brown: #A1887F;
    --cream: #EFEBE9;
    --warm-beige: #F5F0EB;
    --dark-text: #3E2723;
    --medium-text: #5D4037;
    --light-text: #8D6E63;
    --accent-gold: #D4A574;
    --deep-brown: #2C1810;
    
    /* Standard colors */
    --white: #FFFFFF;
    --off-white: #FAFAFA;
    --border-color: #E8E0D8;
    --shadow-color: rgba(93, 64, 55, 0.08);
    
    /* Functional colors */
    --success: #4CAF50;
    --error: #E53935;
    --info: #2196F3;
    
    /* Typography - Premium Font Stack */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    
    /* Border radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
}

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

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

body {
    font-family: var(--font-family);
    background: var(--off-white);
    color: var(--dark-text);
    line-height: 1.7;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Page Wrapper */
.page-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow-x: hidden;
}

/* Background Decoration */
.bg-decoration {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.4;
    filter: blur(80px);
}

.circle-1 {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, #D4A574 0%, #A1887F 100%);
    top: -200px;
    right: -200px;
    opacity: 0.12;
}

.circle-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #795548 0%, #5D4037 100%);
    bottom: 10%;
    left: -100px;
    opacity: 0.08;
}

.circle-3 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #EFEBE9 0%, #D7CCC8 100%);
    top: 50%;
    right: 10%;
    opacity: 0.15;
}

/* Navigation */
.navbar {
    position: relative;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-xl);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(232, 224, 216, 0.6);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* Logo */
.logo {
    height: 52px;
    width: auto;
    object-fit: contain;
    filter: saturate(0.9) brightness(0.95);
    transition: filter var(--transition-normal);
}

.logo:hover {
    filter: saturate(1) brightness(1);
}

.brand-text {
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 600;
    color: var(--deep-brown);
    letter-spacing: -0.01em;
    line-height: 1.3;
}

.nav-verify-btn,
.nav-home-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--primary-brown) 0%, var(--medium-brown) 100%);
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    letter-spacing: 0.01em;
}

.nav-verify-btn:hover,
.nav-home-btn:hover {
    background: var(--deep-brown);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(93, 64, 55, 0.2);
}

/* Hero Section */
.hero-section {
    position: relative;
    z-index: 1;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3xl) var(--spacing-xl);
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin-bottom: var(--spacing-3xl);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 8px 16px;
    background: linear-gradient(135deg, var(--accent-gold) 0%, #C49B6A 100%);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-radius: 100px;
    margin-bottom: var(--spacing-lg);
}

.badge-blue {
    background: linear-gradient(135deg, var(--info) 0%, #1976D2 100%);
}

/* Hero Title */
.hero-title {
    font-family: var(--font-family);
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 700;
    line-height: 1.12;
    color: var(--deep-brown);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.03em;
}

.highlight {
    background: linear-gradient(135deg, var(--primary-brown) 0%, var(--medium-brown) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-family: var(--font-family);
    font-size: 1.15rem;
    font-weight: 400;
    color: var(--light-text);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
    letter-spacing: 0.01em;
}

.hero-note {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--cream);
    border-radius: var(--radius-md);
    color: var(--medium-text);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-xl);
    line-height: 1.5;
}

.hero-note svg {
    color: var(--accent-gold);
    flex-shrink: 0;
}

/* CTA Button */
.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 14px 32px;
    background: linear-gradient(135deg, var(--primary-brown) 0%, var(--medium-brown) 100%);
    color: var(--white);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.05rem;
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    box-shadow: 0 4px 20px rgba(93, 64, 55, 0.25);
    letter-spacing: 0.02em;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 28px rgba(93, 64, 55, 0.35);
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1100px;
    width: 100%;
}

.feature-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px var(--shadow-color);
    border-color: transparent;
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--cream) 0%, var(--warm-beige) 100%);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    color: var(--primary-brown);
}

.feature-card h3 {
    font-family: var(--font-family);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--deep-brown);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.01em;
}

.feature-card p {
    font-family: var(--font-family);
    font-size: 0.95rem;
    color: var(--light-text);
    line-height: 1.6;
}

/* Verify Section */
.verify-section {
    position: relative;
    z-index: 1;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3xl) var(--spacing-xl);
}

.verify-container {
    max-width: 560px;
    width: 100%;
}

.verify-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.verify-title {
    font-family: var(--font-family);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--deep-brown);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.verify-subtitle {
    font-family: var(--font-family);
    font-size: 1rem;
    color: var(--light-text);
    line-height: 1.6;
}

/* Verify Form */
.verify-form {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
}

.input-group {
    margin-bottom: var(--spacing-lg);
}

.input-group label {
    display: block;
    font-family: var(--font-family);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--medium-text);
    margin-bottom: var(--spacing-sm);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrapper svg {
    position: absolute;
    left: var(--spacing-md);
    color: var(--light-text);
    pointer-events: none;
}

.input-wrapper input {
    width: 100%;
    padding: 14px 14px 14px 48px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 1rem;
    color: var(--dark-text);
    background: var(--off-white);
    transition: all var(--transition-fast);
}

.input-wrapper input:focus {
    outline: none;
    border-color: var(--primary-brown);
    background: var(--white);
    box-shadow: 0 0 0 3px rgba(93, 64, 55, 0.1);
}

.input-wrapper input::placeholder {
    color: var(--light-text);
}

.verify-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 14px var(--spacing-xl);
    background: linear-gradient(135deg, var(--primary-brown) 0%, var(--medium-brown) 100%);
    color: var(--white);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    letter-spacing: 0.02em;
}

.verify-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(93, 64, 55, 0.3);
}

.verify-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* Spinner */
.spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--white);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.verify-btn.loading .spinner {
    display: block;
}

.verify-btn.loading span,
.verify-btn.loading svg:first-child {
    display: none;
}

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

/* Result Container */
.result-container {
    margin-top: var(--spacing-lg);
}

/* Certificate Card */
.certificate-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    text-align: center;
    animation: fadeIn 0.4s ease;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.cert-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.cert-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--success) 0%, #388E3C 100%);
    border-radius: 50%;
    color: var(--white);
}

.cert-header span {
    font-family: var(--font-family);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--success);
}

.cert-logo {
    margin-bottom: var(--spacing-md);
}

.cert-logo img {
    height: 60px;
    width: auto;
}

.cert-org {
    font-family: var(--font-family);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--light-text);
    margin-bottom: var(--spacing-lg);
}

.cert-statement {
    font-family: var(--font-family);
    font-size: 0.95rem;
    color: var(--light-text);
    margin-bottom: var(--spacing-xs);
}

.cert-name {
    font-family: var(--font-family);
    font-size: 2rem;
    font-weight: 700;
    color: var(--deep-brown);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.cert-desc {
    font-family: var(--font-family);
    font-size: 0.95rem;
    color: var(--light-text);
    margin-bottom: var(--spacing-sm);
}

.cert-course {
    display: inline-block;
    font-family: var(--font-family);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--primary-brown);
    padding: 8px 20px;
    background: var(--cream);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-xl);
}

.cert-details {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-xl);
}

.cert-detail {
    text-align: center;
}

.cert-detail .label {
    display: block;
    font-family: var(--font-family);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--light-text);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.cert-detail .value {
    font-family: var(--font-family);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--dark-text);
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 14px 28px;
    background: linear-gradient(135deg, var(--success) 0%, #388E3C 100%);
    color: var(--white);
    text-decoration: none;
    font-family: var(--font-family);
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.3);
}

/* Not Found Card */
.not-found-card {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    text-align: center;
    animation: fadeIn 0.4s ease;
}

.not-found-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #FFEBEE 0%, #FFCDD2 100%);
    border-radius: 50%;
    margin-bottom: var(--spacing-lg);
    color: var(--error);
}

.not-found-card h3 {
    font-family: var(--font-family);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--dark-text);
    margin-bottom: var(--spacing-sm);
}

.not-found-card p {
    font-family: var(--font-family);
    font-size: 0.95rem;
    color: var(--light-text);
    margin-bottom: var(--spacing-sm);
}

.not-found-note {
    font-family: var(--font-family);
    font-size: 0.9rem;
    color: var(--medium-text);
}

.not-found-note a {
    color: var(--primary-brown);
    text-decoration: none;
    font-weight: 500;
}

.not-found-note a:hover {
    text-decoration: underline;
}

/* Error Container */
.error-container {
    background: linear-gradient(135deg, #FFF3E0 0%, #FFE0B2 100%);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid #FFCC80;
    text-align: center;
}

.error-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--white);
    border-radius: 50%;
    margin-bottom: var(--spacing-md);
    color: #E65100;
}

.error-container h4 {
    font-family: var(--font-family);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark-text);
    margin-bottom: var(--spacing-sm);
}

.error-container p {
    font-family: var(--font-family);
    font-size: 0.95rem;
    color: var(--medium-text);
    margin-bottom: var(--spacing-lg);
}

.retry-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 10px 20px;
    background: #E65100;
    color: var(--white);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.retry-btn:hover {
    background: #BF360C;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Footer */
.footer {
    position: relative;
    z-index: 1;
    background: var(--white);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-logo {
    height: 40px;
    width: auto;
}

.footer-brand span {
    font-family: var(--font-family);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--medium-text);
}

.footer-contact {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-contact svg {
    color: var(--light-text);
}

.footer-contact a {
    color: var(--primary-brown);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
}

.footer-contact a:hover {
    text-decoration: underline;
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: var(--spacing-lg);
    text-align: center;
}

.footer-bottom p {
    font-family: var(--font-family);
    font-size: 0.85rem;
    color: var(--light-text);
}

/* Responsive Design */
@media (max-width: 768px) {
    .navbar {
        padding: var(--spacing-md);
    }
    
    .brand-text {
        font-size: 0.9rem;
    }
    
    .logo {
        height: 44px;
    }
    
    .hero-section {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    .hero-title {
        font-size: 1.9rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .verify-section {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    .cert-details {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .nav-verify-btn,
    .nav-home-btn {
        padding: 8px 16px;
        font-size: 0.85rem;
    }
    
    .hero-note {
        font-size: 0.85rem;
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .cert-name {
        font-size: 1.6rem;
    }
    
    .cta-button {
        padding: 12px 24px;
        font-size: 1rem;
    }
}