/* =========================================
   BSAI - Minimal & Professional Design
   ========================================= */

:root {
    --color-primary: #75FFA4;
    --color-secondary: #485163;
    --color-dark: #003E32;
    --color-darker: #002520;
    --color-text: #1a1a1a;
    --color-text-light: #666666;
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fa;
    --color-border: #e5e5e5;
    
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 40px;
}

.container-fluid {
    padding: 0 80px;
}

/* =====================================
   SIDEBAR NAVIGATION
   ===================================== */

.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 280px;
    height: 100vh;
    background: var(--color-bg);
    border-right: 1px solid var(--color-border);
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

.sidebar-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 60px 40px;
}

.logo-wrapper {
    margin-bottom: 80px;
}

.sidebar-logo {
    max-width: 140px;
    height: auto;
}

.nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nav-link {
    display: block;
    padding: 12px 0;
    color: var(--color-text-light);
    text-decoration: none;
    font-size: 15px;
    font-weight: 400;
    letter-spacing: -0.01em;
    transition: var(--transition);
    position: relative;
}

.nav-link::before {
    content: '';
    position: absolute;
    left: -40px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

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

.nav-link.active::before {
    width: 24px;
}

.sidebar-footer {
    margin-top: auto;
}

.social {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.social a {
    color: var(--color-text-light);
    transition: var(--transition);
}

.social a:hover {
    color: var(--color-primary);
}

.copyright {
    font-size: 13px;
    color: var(--color-text-light);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: 30px;
    right: 30px;
    z-index: 1001;
    width: 44px;
    height: 44px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    transition: var(--transition);
}

.mobile-menu-toggle span {
    width: 18px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition);
}

/* =====================================
   MAIN CONTENT
   ===================================== */

.main-content {
    margin-left: 280px;
    min-height: 100vh;
}

.section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0;
}

/* =====================================
   HERO SECTION
   ===================================== */

.hero-section {
    position: relative;
    background: linear-gradient(135deg, var(--color-darker) 0%, var(--color-dark) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
}

.label {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(117, 255, 164, 0.1);
    border: 1px solid rgba(117, 255, 164, 0.3);
    border-radius: 50px;
    color: var(--color-primary);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 32px;
}

.hero-title {
    font-size: clamp(48px, 6vw, 72px);
    font-weight: 600;
    line-height: 1.1;
    color: #ffffff;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero-text {
    font-size: 18px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 48px;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: 60px;
    left: 80px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: rgba(255, 255, 255, 0.5);
    font-size: 11px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.scroll-indicator .line {
    width: 40px;
    height: 1px;
    background: rgba(255, 255, 255, 0.3);
}

/* =====================================
   BUTTONS
   ===================================== */

.btn {
    display: inline-block;
    padding: 16px 40px;
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    border-radius: 50px;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    letter-spacing: -0.01em;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-dark);
}

.btn-primary:hover {
    background: #5FE094;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(117, 255, 164, 0.3);
}

.btn-outline {
    background: transparent;
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-full {
    width: 100%;
}

/* =====================================
   SECTION HEADERS
   ===================================== */

.section-header {
    display: flex;
    align-items: center;
    gap: 32px;
    margin-bottom: 80px;
}

.section-number {
    font-size: 14px;
    color: var(--color-text-light);
    font-weight: 500;
}

.section-title {
    font-size: clamp(36px, 4vw, 48px);
    font-weight: 600;
    letter-spacing: -0.02em;
}

/* =====================================
   ABOUT SECTION
   ===================================== */

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

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.about-text {
    padding-top: 8px;
}

.lead {
    font-size: 20px;
    line-height: 1.6;
    color: var(--color-text);
    margin-bottom: 24px;
    font-weight: 400;
}

.about-text p {
    color: var(--color-text-light);
    margin-bottom: 16px;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.stat-box {
    padding: 32px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: var(--transition);
}

.stat-box:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.stat-number {
    font-size: 40px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 14px;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* =====================================
   SERVICES SECTION
   ===================================== */

.services-list {
    display: flex;
    flex-direction: column;
}

.service-item {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 40px;
    padding: 48px 0;
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
}

.service-item:hover {
    padding-left: 20px;
}

.service-number {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text-light);
}

.service-title {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

.service-desc {
    color: var(--color-text-light);
    line-height: 1.7;
    max-width: 680px;
}

/* =====================================
   CONTACT SECTION
   ===================================== */

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

.contact-grid {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 100px;
}

.contact-info h3 {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

.contact-info > p {
    color: var(--color-text-light);
    margin-bottom: 48px;
}

.info-list {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.info-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text-light);
    margin-bottom: 8px;
}

.info-item p,
.info-item a {
    color: var(--color-text);
    text-decoration: none;
    line-height: 1.6;
}

.info-item a:hover {
    color: var(--color-primary);
}

/* =====================================
   FORM
   ===================================== */

.contact-form {
    background: var(--color-bg);
    padding: 48px;
    border: 1px solid var(--color-border);
    border-radius: 12px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: 16px 20px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-family: var(--font-primary);
    font-size: 15px;
    transition: var(--transition);
    background: var(--color-bg);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.form-message {
    margin-top: 20px;
    padding: 16px;
    border-radius: 8px;
    text-align: center;
    display: none;
}

.form-message.success {
    background: rgba(117, 255, 164, 0.1);
    color: var(--color-dark);
    border: 1px solid var(--color-primary);
}

.form-message.error {
    background: rgba(239, 68, 68, 0.1);
    color: #dc2626;
    border: 1px solid #dc2626;
}

/* =====================================
   FOOTER
   ===================================== */

.footer {
    padding: 60px 0;
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
}

.footer p {
    text-align: center;
    color: var(--color-text-light);
    font-size: 14px;
}

/* =====================================
   RESPONSIVE
   ===================================== */

@media (max-width: 1024px) {
    .sidebar {
        width: 240px;
    }
    
    .main-content {
        margin-left: 240px;
    }
    
    .container-fluid {
        padding: 0 60px;
    }
    
    .about-grid,
    .contact-grid {
        gap: 60px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .container,
    .container-fluid {
        padding: 0 24px;
    }
    
    .section {
        padding: 80px 0;
        min-height: auto;
    }
    
    .hero-section {
        min-height: 100vh;
    }
    
    .section-header {
        margin-bottom: 48px;
    }
    
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        padding: 32px 24px;
    }
    
    .scroll-indicator {
        left: 24px;
    }
    
    .service-item {
        grid-template-columns: 60px 1fr;
        gap: 20px;
        padding: 32px 0;
    }
    
    .service-item:hover {
        padding-left: 0;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}