/* ==========================================
   Base Styles - Global CSS
   ========================================== */

/* CSS Variables */
:root {
    /* Colors */
    --primary-color: #0077B6;
    --primary-hover: #005A8D;
    --accent-color: #00B4D8;
    --dark-navy: #023E8A;
    --success-green: #2A9D8F;
    --white: #FFFFFF;
    --light-gray: #F8F9FA;
    --warm-gray: #6C757D;
    --border-color: #E0E0E0;
    --text-dark: #1A1A1A;
    --text-secondary: #4A4A4A;
    
    /* Typography */
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.12);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Container */
    --container-max-width: 1200px;
}

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

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

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    color: var(--dark-navy);
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

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

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

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

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

/* Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Main Content */
.main-content {
    min-height: 60vh;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}

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

.btn-light:hover {
    background-color: var(--light-gray);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-outline-light {
    background-color: transparent;
    color: var(--white);
    border-color: var(--white);
}

.btn-outline-light:hover {
    background-color: var(--white);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Section Styles */
section {
    padding: var(--spacing-xxl) 0;
}

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

.section-label {
    display: inline-block;
    color: var(--primary-color);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-xs);
}

.section-title {
    font-size: 2.5rem;
    color: var(--dark-navy);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

.section-cta {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

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

.scroll-to-top:hover {
    background-color: var(--primary-hover);
    transform: translateY(-3px);
}

/* Responsive Typography */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-xxl: 3rem;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.375rem; }
    
    .section-title {
        font-size: 2rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .btn-lg {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }
}

/* Messages Container */
.messages-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 9999;
    max-width: 400px;
    width: 100%;
}

.alert {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: slideInRight 0.3s ease-out;
    font-family: var(--font-body);
    font-size: 0.95rem;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.alert-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert-content i {
    font-size: 1.25rem;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border-left: 4px solid #28a745;
}

.alert-success i {
    color: #28a745;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border-left: 4px solid #dc3545;
}

.alert-error i {
    color: #dc3545;
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
    border-left: 4px solid #ffc107;
}

.alert-warning i {
    color: #ffc107;
}

.alert-info {
    background-color: #d1ecf1;
    color: #0c5460;
    border-left: 4px solid #17a2b8;
}

.alert-info i {
    color: #17a2b8;
}

.alert-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.25rem;
    color: inherit;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
}

.alert-close:hover {
    opacity: 1;
}

/* Auto-dismiss messages after 5 seconds */
.alert {
    animation: slideInRight 0.3s ease-out, fadeOut 0.3s ease-out 4.7s forwards;
}

@keyframes fadeOut {
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

@media (max-width: 768px) {
    .messages-container {
        top: 70px;
        right: 10px;
        left: 10px;
        max-width: none;
    }

    .alert {
        padding: 0.875rem 1rem;
        font-size: 0.9rem;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-inline-flex { display: inline-flex; }