/* =============================================
   SC INTERNATIONAL - UI/UX IMPROVEMENTS
   Consolidated, Clean & Fully Responsive
   ============================================= */

/* === CSS VARIABLES - DESIGN SYSTEM === */
:root {
    /* Colors */
    --color-primary: #003d5c;
    --color-primary-light: #0a5f7f;
    --color-primary-lighter: #4fa8c5;
    --color-accent: #e53e3e;
    --color-accent-dark: #c53030;
    --color-text-dark: #1e3555;
    --color-text-light: #5c6b7a;
    --color-bg-light: #f8f9fa;
    --color-bg-white: #ffffff;
    --color-border: rgba(0, 0, 0, 0.08);
    
    /* Spacing Scale */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 50%;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.2);
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === RESET & BASE === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: auto;
}

body {
    font-family: var(--font-family);
    background: var(--color-bg-white);
    color: var(--color-text-dark);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* === CONTAINER === */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

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

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text-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);
}

p {
    color: var(--color-text-light);
    line-height: 1.8;
}

/* === BUTTONS === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--font-size-base);
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
    box-sizing: border-box;
}

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

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

.btn-primary:hover {
    background: var(--color-accent-dark);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--color-accent);
    border: 2px solid var(--color-accent);
}

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

/* Hero buttons specific styling */
.hero-rrd-buttons .btn-primary {
    background: #e53e3e;
    color: white;
    border: none;
}

.hero-rrd-buttons .btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.hero-rrd-buttons .btn-secondary:hover {
    background: white;
    color: #003d5c;
}

.btn-outline {
    background: transparent;
    color: var(--color-accent);
    border: 2px solid var(--color-accent);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
}

.btn-outline:hover {
    background: var(--color-accent);
    color: white;
}

.btn-outline-white {
    background: transparent;
    color: white;
    border: 2px solid white;
}

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

/* === SECTION HEADER === */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-3xl);
}

.section-subtitle {
    display: inline-block;
    background: var(--color-accent);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 30px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
}

.section-header h2 {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-dark);
}

.section-header p {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
}

/* === RESPONSIVE UTILITIES === */
@media (max-width: 1024px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
    
    h1 {
        font-size: clamp(1.75rem, 4vw, 2.5rem);
    }
    
    h2 {
        font-size: clamp(1.5rem, 3vw, 2rem);
    }
}

@media (max-width: 768px) {
    .section-header {
        margin-bottom: var(--spacing-2xl);
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
    }
}

@media (max-width: 480px) {
    .btn {
        width: 100%;
        padding: var(--spacing-md);
        font-size: 0.85rem;
        min-height: 48px;
    }
    
    .hero-rrd-buttons {
        gap: 1rem;
    }
    
    .hero-rrd-buttons .btn {
        width: 100%;
        padding: 1rem 1.5rem;
    }
    
    .section-header h2 {
        font-size: 1.5rem;
    }
    
    .section-header p {
        font-size: var(--font-size-base);
    }
}

/* === ANIMATIONS - OPTIMIZED === */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Disable heavy animations on mobile */
@media (max-width: 768px) {
    .sparkle {
        display: none;
    }
    
    .hero-ribbon {
        animation: none;
    }
    
    .running-text-wrapper {
        animation-duration: 70s !important;
    }
}

/* === GRID LAYOUTS - RESPONSIVE === */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

@media (max-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}

/* === FLEX UTILITIES === */
.flex {
    display: flex;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.flex-col {
    flex-direction: column;
}

.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

/* === SPACING UTILITIES === */
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.px-sm { padding-left: var(--spacing-sm); padding-right: var(--spacing-sm); }
.px-md { padding-left: var(--spacing-md); padding-right: var(--spacing-md); }
.px-lg { padding-left: var(--spacing-lg); padding-right: var(--spacing-lg); }

.py-sm { padding-top: var(--spacing-sm); padding-bottom: var(--spacing-sm); }
.py-md { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
.py-lg { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }

/* === VISIBILITY UTILITIES === */
.hide-mobile {
    display: none;
}

@media (min-width: 769px) {
    .hide-mobile {
        display: block;
    }
    
    .show-mobile {
        display: none;
    }
}

/* === FOCUS STATES - ACCESSIBILITY === */
button:focus-visible,
a:focus-visible,
input:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* === SMOOTH SCROLLING - DISABLED (Handled by JavaScript) === */
html {
    scroll-behavior: auto;
}

/* === PRINT STYLES === */
@media print {
    .navbar,
    .back-to-top,
    .mobile-toggle {
        display: none;
    }
}