/* ========================================
   CPA XIX 2024 - SAVANNAKHET TEAM
   Modern Landing Page Styles
   ======================================== */

/* CSS Variables */
:root {
    --primary: #1e40af;
    --primary-dark: #1e3a8a;
    --primary-light: #3b82f6;
    --secondary: #0891b2;
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    --success: #10b981;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray: #64748b;
    --gray-light: #94a3b8;
    --light: #f1f5f9;
    --white: #ffffff;
    --gradient-primary: linear-gradient(135deg, #1e40af 0%, #0891b2 100%);
    --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);
    --gradient-accent: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Ropa Sans', 'DM Sans', 'Roboto', 'Source Sans 3', 'Poppins', 'Noto Sans Lao Looped', 'Phetsarath_OT', 'Phetsarath', sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--dark);
    background: var(--light);
    overflow-x: hidden;
}

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

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

ul, ol {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--dark);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-whatsapp {
    background: #25D366;
    color: var(--white);
}

.btn-whatsapp:hover {
    background: #128C7E;
    transform: translateY(-3px);
}

.btn-call {
    background: var(--gradient-accent);
    color: var(--white);
}

.btn-call:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-download {
    background: var(--white);
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-download:hover {
    background: var(--primary);
    color: var(--white);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.logo svg {
    width: 45px;
    height: 45px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-links a {
    font-weight: 500;
    color: var(--dark);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-btn svg {
    width: 28px;
    height: 28px;
    color: var(--dark);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-dark);
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/banner.jpg') center/cover no-repeat;
    opacity: 0.2;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -50px;
    left: 0;
    right: 0;
    height: 100px;
    background: var(--light);
    clip-path: polygon(0 50%, 100% 0, 100% 100%, 0 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    padding: 60px 0;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50px;
    font-size: 0.9rem;
    margin-bottom: 25px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero h1 {
    color: var(--white);
    margin-bottom: 20px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero h1 span {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 15px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-location {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 1.1rem;
    opacity: 0.85;
    margin-bottom: 35px;
}

.hero-location svg {
    width: 22px;
    height: 22px;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
}

/* Team Section */
.team-section {
    padding: 100px 0;
    background: var(--white);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(30, 64, 175, 0.1);
    color: var(--primary);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.section-header h2 {
    margin-bottom: 15px;
}

.section-header p {
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
}

.team-image-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.team-image-wrapper::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition);
    z-index: 1;
}

.team-image-wrapper:hover::before {
    opacity: 0.1;
}

.team-image-wrapper img {
    width: 100%;
    transition: var(--transition);
}

.team-image-wrapper:hover img {
    transform: scale(1.02);
}

/* Class Link Section */
.class-link-section {
    padding: 80px 0;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.class-link-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 500px;
    height: 500px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

.class-link-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
}

.class-link-content h2 {
    color: var(--white);
    margin-bottom: 15px;
}

.class-link-content p {
    opacity: 0.9;
    margin-bottom: 30px;
    font-size: 1.1rem;
}

.class-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 18px 40px;
    background: var(--white);
    color: var(--primary);
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.class-link-btn:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.class-link-btn svg {
    width: 28px;
    height: 28px;
}

/* Schedule Section */
.schedule-section {
    padding: 100px 0;
    background: var(--light);
}

.schedule-tabs {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.schedule-tab {
    padding: 12px 24px;
    background: var(--white);
    border: 2px solid var(--gray-light);
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.schedule-tab.active,
.schedule-tab:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--white);
}

.schedule-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.schedule-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-left: 4px solid var(--primary);
}

.schedule-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.schedule-card.completed {
    border-left-color: var(--success);
}

.schedule-card.current {
    border-left-color: var(--accent);
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.05) 0%, var(--white) 100%);
}

.schedule-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 15px;
}

.schedule-code {
    font-size: 0.85rem;
    font-weight: 700;
    padding: 5px 12px;
    background: rgba(30, 64, 175, 0.1);
    color: var(--primary);
    border-radius: 50px;
}

.schedule-status {
    font-size: 0.8rem;
    padding: 4px 10px;
    border-radius: 50px;
    font-weight: 600;
}

.schedule-status.completed {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.schedule-status.current {
    background: rgba(245, 158, 11, 0.15);
    color: var(--accent);
}

.schedule-status.upcoming {
    background: rgba(100, 116, 139, 0.1);
    color: var(--gray);
}

.schedule-card h4 {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.schedule-card p {
    color: var(--gray);
    font-size: 0.95rem;
}

/* Downloads Section */
.downloads-section {
    padding: 100px 0;
    background: var(--white);
}

.downloads-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 20px;
}

.download-card {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: var(--light);
    border-radius: var(--radius);
    transition: var(--transition);
    border: 1px solid transparent;
}

.download-card:hover {
    background: var(--white);
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.download-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius);
    flex-shrink: 0;
}

.download-icon svg {
    width: 24px;
    height: 24px;
    color: var(--white);
}

.download-info {
    flex: 1;
}

.download-info h4 {
    font-size: 1rem;
    margin-bottom: 4px;
}

.download-info p {
    font-size: 0.85rem;
    color: var(--gray);
}

.download-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(30, 64, 175, 0.1);
    border-radius: 50%;
    color: var(--primary);
    transition: var(--transition);
}

.download-card:hover .download-btn {
    background: var(--primary);
    color: var(--white);
}

/* Laws Section */
.laws-section {
    padding: 100px 0;
    background: var(--gradient-dark);
    color: var(--white);
}

.laws-section .section-badge {
    background: rgba(255, 255, 255, 0.15);
    color: var(--white);
}

.laws-section .section-header h2 {
    color: var(--white);
}

.laws-section .section-header p {
    color: rgba(255, 255, 255, 0.7);
}

.laws-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 40px;
}

.law-category-btn {
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    color: var(--white);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.law-category-btn.active,
.law-category-btn:hover {
    background: var(--white);
    color: var(--primary);
}

.laws-grid {
    display: grid;
    gap: 15px;
}

.law-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: var(--radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.law-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateX(10px);
}

.law-icon {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-accent);
    border-radius: var(--radius);
    flex-shrink: 0;
}

.law-icon svg {
    width: 22px;
    height: 22px;
    color: var(--white);
}

.law-info {
    flex: 1;
}

.law-info h4 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 3px;
}

.law-info p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

.law-download {
    padding: 10px 20px;
    background: var(--white);
    color: var(--primary);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.law-download:hover {
    background: var(--accent);
    color: var(--white);
}

.law-download svg {
    width: 18px;
    height: 18px;
}

/* Contact Section */
.contact-section {
    padding: 100px 0;
    background: var(--light);
}

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

.contact-info h2 {
    margin-bottom: 20px;
}

.contact-info > p {
    color: var(--gray);
    margin-bottom: 30px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.contact-item-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius);
    flex-shrink: 0;
}

.contact-item-icon svg {
    width: 24px;
    height: 24px;
    color: var(--white);
}

.contact-item-text h4 {
    font-size: 1rem;
    margin-bottom: 3px;
}

.contact-item-text p {
    color: var(--gray);
    font-size: 0.95rem;
}

.contact-item-text a {
    color: var(--primary);
    font-weight: 500;
}

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

.contact-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.profile-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-xl);
    text-align: center;
}

.profile-image {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 25px;
    border: 4px solid var(--primary);
    box-shadow: var(--shadow-lg);
}

.profile-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-card h3 {
    margin-bottom: 5px;
}

.profile-card .subtitle {
    color: var(--gray);
    margin-bottom: 20px;
}

.profile-education {
    text-align: left;
    margin-top: 25px;
    padding-top: 25px;
    border-top: 1px solid var(--light);
}

.profile-education h4 {
    font-size: 1rem;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.profile-education h4 svg {
    width: 20px;
    height: 20px;
    color: var(--primary);
}

.education-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 0.9rem;
    color: var(--gray);
}

.education-item svg {
    width: 18px;
    height: 18px;
    color: var(--success);
    flex-shrink: 0;
    margin-top: 3px;
}

/* Footer */
.footer {
    background: var(--dark);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 15px;
}

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

.footer-about p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
}

.footer-links h4 {
    color: var(--white);
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        box-shadow: var(--shadow-lg);
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero {
        min-height: auto;
        padding: 120px 0 100px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .schedule-grid {
        grid-template-columns: 1fr;
    }

    .downloads-grid {
        grid-template-columns: 1fr;
    }

    .law-item {
        flex-direction: column;
        text-align: center;
    }

    .law-info {
        text-align: center;
    }

    .contact-buttons {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .team-section,
    .schedule-section,
    .downloads-section,
    .contact-section {
        padding: 60px 0;
    }

    .laws-section {
        padding: 60px 0;
    }

    .profile-card {
        padding: 25px;
    }

    .profile-image {
        width: 120px;
        height: 120px;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

.class-link-btn {
    animation: pulse 2s infinite;
}

/* Scroll Progress */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--gradient-accent);
    z-index: 1001;
    transition: width 0.1s;
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
}