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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #10b981;
    --text-dark: #1f2937;
    --text-gray: #6b7280;
    --text-light: #9ca3af;
    --bg-white: #ffffff;
    --bg-gray: #f9fafb;
    --bg-light: #f3f4f6;
    --border-color: #e5e7eb;
    --error-color: #ef4444;
    --success-color: #10b981;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-white);
}

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

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.site-header {
    background: var(--bg-white);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: box-shadow 0.3s ease;
}

.site-header.scrolled {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Header Top Bar */
.header-top {
    background: var(--bg-gray);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.875rem;
    max-height: 200px;
    overflow: hidden;
    opacity: 1;
    transition: max-height 0.4s ease, opacity 0.4s ease, padding 0.4s ease;
}

.site-header.scrolled .header-top {
    max-height: 0;
    opacity: 0;
    padding-top: 0;
    padding-bottom: 0;
}

.header-top-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    gap: 1rem;
}

.header-contact {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.header-contact-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-gray);
    font-weight: 500;
    transition: color 0.3s ease;
}

.header-contact-item:hover {
    color: var(--primary-color);
}

.header-contact-item svg {
    flex-shrink: 0;
}

.header-promo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-weight: 600;
}

.header-promo svg {
    flex-shrink: 0;
}

/* Header Main */
.header-main {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: translateY(-2px);
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.logo-content {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-text {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-dark);
}

.logo-subtext {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* Navigation */
.main-nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.main-nav a:not(.btn-header-cta) {
    font-weight: 500;
    color: var(--text-gray);
    position: relative;
    padding: 0.5rem 0;
    transition: color 0.3s ease;
}

.main-nav a:not(.btn-header-cta):hover,
.main-nav a:not(.btn-header-cta).active {
    color: var(--primary-color);
}

.main-nav a:not(.btn-header-cta)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.main-nav a:not(.btn-header-cta).active::after,
.main-nav a:not(.btn-header-cta):hover::after {
    transform: scaleX(1);
}

/* Header CTA Button */
.btn-header-cta {
    display: inline-block;
    background: var(--primary-color) !important;
    color: white !important;
    padding: 0.625rem 1.5rem !important;
    border-radius: 0.375rem;
    font-weight: 600;
    font-size: 0.9375rem;
    transition: all 0.3s ease;
    border: none;
    white-space: nowrap;
    text-align: center;
}

.btn-header-cta:hover {
    background: var(--primary-dark) !important;
    color: white !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-header-cta::after {
    display: none;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    transition: all 0.3s ease;
    border-radius: 2px;
}

/* Footer */
.site-footer {
    background: var(--text-dark);
    color: var(--bg-light);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-col h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--bg-white);
}

.footer-col h4 {
    font-size: 1rem;
    margin-bottom: 0.75rem;
    color: var(--bg-white);
}

.footer-col p {
    color: var(--text-light);
    line-height: 1.6;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 0.5rem;
}

.footer-col ul a {
    color: var(--text-light);
}

.footer-col ul a:hover {
    color: var(--bg-white);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-light);
}

/* Main Content */
main {
    min-height: calc(100vh - 200px);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

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

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

.btn-secondary {
    background: var(--bg-light);
    color: var(--text-dark);
}

.btn-secondary:hover {
    background: var(--border-color);
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #6ee7b7;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

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

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-error {
    color: var(--error-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* Responsive */
@media (max-width: 968px) {
    .header-top {
        display: none;
    }
    
    .logo-text {
        font-size: 1rem;
    }
    
    .logo-subtext {
        font-size: 0.75rem;
    }
}

@media (max-width: 768px) {
    .header-contact {
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }
    
    .header-promo {
        display: none;
    }
    
    .logo-icon {
        width: 40px;
        height: 40px;
    }
    
    .logo-icon svg {
        width: 24px;
        height: 24px;
    }
    
    .main-nav {
        position: fixed;
        top: 0;
        left: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg-white);
        flex-direction: column;
        padding: 6rem 2rem 2rem;
        transition: left 0.3s ease;
        box-shadow: 2px 0 20px rgba(0, 0, 0, 0.1);
        align-items: flex-start;
        gap: 0;
    }
    
    .main-nav.active {
        left: 0;
    }
    
    .main-nav a {
        width: 100%;
        padding: 1rem 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    .main-nav a::after {
        display: none;
    }
    
    .btn-header-cta {
        width: 100%;
        text-align: center;
        margin-top: 1rem;
    }
    
    .mobile-menu-toggle {
        display: flex;
        z-index: 101;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
}