/* ==========================================================================
   FULLTENT - Global Styles
   Industrial B2B Corporate Theme
   ========================================================================== */

:root {
    --primary: #1a3a5c;
    --primary-light: #2c5282;
    --primary-dark: #0f2340;
    --secondary: #4a5568;
    --accent: #ed8936;
    --accent-light: #f6ad55;
    --accent-dark: #dd6b20;
    --success: #38a169;
    --error: #e53e3e;
    --white: #ffffff;
    --gray-50: #f7fafc;
    --gray-100: #edf2f7;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e0;
    --gray-400: #a0aec0;
    --gray-500: #718096;
    --gray-600: #4a5568;
    --gray-700: #2d3748;
    --gray-800: #1a202c;
    --gray-900: #171923;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Spacing */
    --sp-1: 0.25rem;
    --sp-2: 0.5rem;
    --sp-3: 0.75rem;
    --sp-4: 1rem;
    --sp-5: 1.25rem;
    --sp-6: 1.5rem;
    --sp-8: 2rem;
    --sp-10: 2.5rem;
    --sp-12: 3rem;
    --sp-16: 4rem;
    --sp-20: 5rem;
    
    /* Border Radius */
    --r-sm: 0.25rem;
    --r-md: 0.5rem;
    --r-lg: 0.75rem;
    --r-xl: 1rem;
    
    /* Shadows */
    --sh-sm: 0 1px 2px rgba(0,0,0,0.05);
    --sh-md: 0 4px 6px rgba(0,0,0,0.1);
    --sh-lg: 0 10px 15px rgba(0,0,0,0.1);
    --sh-xl: 0 20px 25px rgba(0,0,0,0.15);
    
    /* Transitions */
    --t-fast: 150ms ease;
    --t-base: 250ms ease;
    --t-slow: 350ms ease;
    
    /* Layout */
    --max-w: 1200px;
    --pad: 1.5rem;
    --header-h: 80px;
}


@media (max-width: 1024px) {
    :root {
        --header-h: 70px;
    }
}

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

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

body {
    font-family: var(--font);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--gray-700);
    background: var(--white);
    -webkit-font-smoothing: antialiased;
}

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

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

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

ul {
    list-style: none;
}

button {
    cursor: pointer;
    font-family: inherit;
    border: none;
    background: none;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1.2;
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.25rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.875rem); }
h4 { font-size: 1.5rem; }

p {
    margin-bottom: var(--sp-4);
    color: var(--gray-600);
}

p:last-child {
    margin-bottom: 0;
}

/* Layout */
.container {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 var(--pad);
}

.section {
    padding: var(--sp-16) 0;
}

.section--alt {
    background: var(--gray-50);
}

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

.section--primary h2,
.section--primary h3 {
    color: var(--white);
}

.section--primary p {
    color: rgba(255,255,255,0.85);
}

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

.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--sp-4); }
.mb-6 { margin-bottom: var(--sp-6); }
.mb-8 { margin-bottom: var(--sp-8); }
.mb-12 { margin-bottom: var(--sp-12); }

/* Grid */
.grid {
    display: grid;
    gap: var(--sp-8);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

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

@media (max-width: 768px) {
   
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    
    .section {
        padding: var(--sp-12) 0;
    }
    
}

/* Section Title */
.section-title {
    text-align: center;
    margin-bottom: var(--sp-12);
}

.section-title h2 {
    color: var(--primary);
    margin-bottom: var(--sp-4);
}

.section-title p {
    color: var(--gray-500);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Preloader */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 99999;
    transition: opacity 0.5s;
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.preloader-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255,255,255,0.3);
    border-top-color: var(--white);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Utilities */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}