/**
 * Complete Responsive Design System
 * Perfect responsive layout for all devices and screen sizes
 */

:root {
    /* Responsive font sizes using clamp() */
    --font-size-xs: clamp(0.75rem, 1.5vw, 0.875rem);
    --font-size-sm: clamp(0.875rem, 2vw, 1rem);
    --font-size-base: clamp(1rem, 2.5vw, 1.125rem);
    --font-size-lg: clamp(1.125rem, 3vw, 1.25rem);
    --font-size-xl: clamp(1.25rem, 3.5vw, 1.5rem);
    --font-size-2xl: clamp(1.5rem, 4vw, 2rem);
    --font-size-3xl: clamp(2rem, 5vw, 3rem);
    --font-size-4xl: clamp(2.5rem, 6vw, 4rem);
    --font-size-5xl: clamp(3rem, 7vw, 5rem);
    
    /* Responsive spacing */
    --spacing-xs: clamp(0.25rem, 1vw, 0.5rem);
    --spacing-sm: clamp(0.5rem, 2vw, 1rem);
    --spacing-md: clamp(1rem, 3vw, 1.5rem);
    --spacing-lg: clamp(1.5rem, 4vw, 2rem);
    --spacing-xl: clamp(2rem, 5vw, 3rem);
    --spacing-2xl: clamp(3rem, 6vw, 4rem);
    
    /* Responsive container */
    --container-padding: clamp(1rem, 4vw, 2rem);
    --container-max-width: min(100% - var(--container-padding) * 2, 1200px);
}

/* === BASE RESPONSIVE CONTAINER === */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* === HERO SECTION RESPONSIVE === */
.hero {
    min-height: 100vh;
    padding: var(--spacing-xl) 0;
}

.hero-title {
    font-size: var(--font-size-5xl);
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-lg);
}

.hero-tags {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.tag-item {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: clamp(15px, 3vw, 25px);
    font-size: var(--font-size-sm);
    transition: all 0.3s ease;
    text-align: center;
    min-width: 120px;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: clamp(25px, 5vw, 50px);
    font-size: var(--font-size-base);
    min-width: 160px;
    text-align: center;
    transition: all 0.3s ease;
}

/* === LOADER RESPONSIVE === */
#loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
}

.logo-text {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-md);
}

.loading-text {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
}

.progress-bar {
    width: clamp(120px, 30vw, 200px);
    height: clamp(2px, 0.5vw, 4px);
    border-radius: 2px;
    margin: 0 auto;
}

/* === SECTION RESPONSIVE === */
.section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
}

/* === FIELD CARDS RESPONSIVE === */
.fields-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    perspective: 1200px;
}

.field-card {
    padding: var(--spacing-lg);
    border-radius: clamp(10px, 2vw, 15px);
    margin-bottom: var(--spacing-md);
    min-height: 200px;
    transition: all 0.3s ease;
}

.field-icon {
    width: clamp(50px, 8vw, 70px);
    height: clamp(50px, 8vw, 70px);
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    margin-bottom: var(--spacing-md);
}

.field-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.field-card p {
    font-size: var(--font-size-base);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

/* === PROJECT CARDS RESPONSIVE === */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.project-card {
    border-radius: clamp(10px, 2vw, 15px);
    overflow: hidden;
    transition: all 0.3s ease;
}

.project-content {
    padding: var(--spacing-lg);
}

.project-content h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.project-content p {
    font-size: var(--font-size-base);
    line-height: 1.6;
}

/* === FLOATING ELEMENTS RESPONSIVE === */
.floating-card {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: clamp(10px, 2vw, 15px);
    font-size: var(--font-size-sm);
    backdrop-filter: blur(10px);
}

.scroll-indicator {
    bottom: var(--spacing-lg);
}

.scroll-line {
    width: 2px;
    height: clamp(30px, 8vw, 50px);
    margin-bottom: var(--spacing-sm);
}

/* === BREAKPOINT-SPECIFIC ADJUSTMENTS === */

/* Large tablets and small laptops (1024px and down) */
@media (max-width: 1024px) {
    .fields-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: var(--spacing-md);
    }
    
    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
    
    .floating-card {
        font-size: var(--font-size-xs);
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

/* Tablets (768px and down) */
@media (max-width: 768px) {
    .hero {
        min-height: 80vh;
        padding: var(--spacing-lg) 0;
    }
    
    .hero-tags {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-xs);
    }
    
    .tag-item {
        width: 100%;
        max-width: 200px;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .floating-card {
        display: none !important;
    }
    
    .fields-grid {
        grid-template-columns: 1fr;
        perspective: none;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .field-card,
    .project-card {
        margin-bottom: var(--spacing-sm);
    }
    
    .scroll-indicator {
        bottom: var(--spacing-md);
    }
}

/* Mobile devices (480px and down) */
@media (max-width: 480px) {
    .hero {
        min-height: 70vh;
        padding: var(--spacing-md) 0;
    }
    
    .tag-item {
        min-width: auto;
        width: 100%;
        max-width: 180px;
    }
    
    .btn {
        max-width: 250px;
        min-width: auto;
    }
    
    .field-card {
        min-height: auto;
        padding: var(--spacing-md);
    }
    
    .project-content {
        padding: var(--spacing-md);
    }
    
    .scroll-indicator {
        display: none;
    }
}

/* Extra small devices (320px and down) */
@media (max-width: 320px) {
    .tag-item {
        max-width: 160px;
        font-size: var(--font-size-xs);
    }
    
    .btn {
        max-width: 220px;
        font-size: var(--font-size-sm);
    }
    
    .field-card,
    .project-content {
        padding: var(--spacing-sm);
    }
}

/* === ORIENTATION RESPONSIVE === */
@media (orientation: landscape) and (max-height: 500px) {
    .hero {
        min-height: 100vh;
        padding: var(--spacing-sm) 0;
    }
    
    .hero-tags {
        margin-bottom: var(--spacing-md);
    }
    
    .scroll-indicator {
        display: none;
    }
}

/* === ACCESSIBILITY AND PERFORMANCE === */

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .floating-card {
        animation: none !important;
    }
    
    .typewriter-text::after {
        animation: none !important;
    }
    
    .scroll-line {
        animation: none !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .hero {
        background: #000000 !important;
        color: #ffffff !important;
    }
    
    .tag-item {
        background: #ffffff !important;
        color: #000000 !important;
        border: 2px solid #000000;
    }
    
    .btn-primary {
        background: #000000 !important;
        color: #ffffff !important;
        border: 2px solid #ffffff;
    }
    
    .btn-secondary {
        background: #ffffff !important;
        color: #000000 !important;
        border: 2px solid #000000;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    .hero {
        background: linear-gradient(135deg, #2d3748 0%, #1a202c 100%);
    }
    
    .tag-item {
        background: rgba(45, 55, 72, 0.9);
        color: white;
    }
    
    .floating-card {
        background: rgba(45, 55, 72, 0.9);
        color: white;
    }
}

/* === TOUCH DEVICE OPTIMIZATIONS === */
@media (hover: none) and (pointer: coarse) {
    .tag-item:hover,
    .btn:hover,
    .field-card:hover,
    .project-card:hover {
        transform: none;
    }
    
    .field-card:active,
    .project-card:active {
        transform: scale(0.98);
    }
    
    .btn:active {
        transform: scale(0.95);
    }
}

/* === HIGH DPI DISPLAYS === */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .hero {
        background-attachment: scroll;
    }
}

/* === VERY WIDE SCREENS === */
@media (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }
    
    .fields-grid {
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    }
    
    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    }
}

/* === PRINT STYLES === */
@media print {
    .floating-card,
    .scroll-indicator,
    #loader {
        display: none !important;
    }
    
    .hero {
        background: white !important;
        color: black !important;
        min-height: auto !important;
        page-break-after: always;
    }
    
    .section {
        page-break-inside: avoid;
        padding: 1rem 0 !important;
    }
    
    .field-card,
    .project-card {
        page-break-inside: avoid;
        box-shadow: none !important;
        border: 1px solid #ddd;
    }
}

/* === GRID UTILITIES === */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-auto {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

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

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

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

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

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

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

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

/* === RESPONSIVE SPACING === */
.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

.m-xs { margin: var(--spacing-xs); }
.m-sm { margin: var(--spacing-sm); }
.m-md { margin: var(--spacing-md); }
.m-lg { margin: var(--spacing-lg); }
.m-xl { margin: var(--spacing-xl); }

/* === RESPONSIVE TEXT === */
.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }
.text-4xl { font-size: var(--font-size-4xl); }
.text-5xl { font-size: var(--font-size-5xl); }

/* === VISIBILITY UTILITIES === */
.hidden { display: none; }
.visible { display: block; }

@media (max-width: 1024px) {
    .hidden-lg { display: none; }
    .visible-lg { display: block; }
}

@media (max-width: 768px) {
    .hidden-md { display: none; }
    .visible-md { display: block; }
}

@media (max-width: 480px) {
    .hidden-sm { display: none; }
    .visible-sm { display: block; }
}