/* ============================================
   MAIN STYLES
   Maharat Al-Muhandis Website
   ============================================ */

/* ========== RESET & BASE ========== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    line-height: var(--leading-normal);
    color: var(--color-black);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========== TYPOGRAPHY ========== */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    margin-bottom: var(--space-4);
}

h1 {
    font-size: var(--text-5xl);
}

h2 {
    font-size: var(--text-4xl);
}

h3 {
    font-size: var(--text-3xl);
}

h4 {
    font-size: var(--text-2xl);
}

h5 {
    font-size: var(--text-xl);
}

h6 {
    font-size: var(--text-lg);
}

p {
    margin-bottom: var(--space-4);
}

a {
    color: var(--color-blue);
    text-decoration: none;
    transition: var(--transition-colors);
}

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

/* ========== LAYOUT UTILITIES ========== */

.container {
    width: 100%;
    max-width: var(--container-2xl);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.container-sm {
    max-width: var(--container-sm);
}

.container-md {
    max-width: var(--container-md);
}

.container-lg {
    max-width: var(--container-lg);
}

.container-xl {
    max-width: var(--container-xl);
}

.section {
    padding: var(--space-20) 0;
}

.section-lg {
    padding: var(--space-32) 0;
}

/* ========== BACKGROUNDS ========== */

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

.bg-black {
    background-color: var(--color-black);
}

.bg-blue {
    background-color: var(--color-blue);
}

.bg-periwinkle {
    background-color: var(--color-periwinkle);
}

.bg-gray-100 {
    background-color: var(--color-gray-100);
}

/* ========== TEXT UTILITIES ========== */

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

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

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

.text-white {
    color: var(--color-white);
}

.text-black {
    color: var(--color-black);
}

.text-blue {
    color: var(--color-blue);
}

.text-gray-600 {
    color: var(--color-gray-600);
}

.font-bold {
    font-weight: var(--font-bold);
}

.font-semibold {
    font-weight: var(--font-semibold);
}

.font-medium {
    font-weight: var(--font-medium);
}

/* ========== SPACING UTILITIES ========== */

.mt-0 {
    margin-top: 0;
}

.mt-4 {
    margin-top: var(--space-4);
}

.mt-8 {
    margin-top: var(--space-8);
}

.mt-12 {
    margin-top: var(--space-12);
}

.mb-0 {
    margin-bottom: 0;
}

.mb-4 {
    margin-bottom: var(--space-4);
}

.mb-8 {
    margin-bottom: var(--space-8);
}

.mb-12 {
    margin-bottom: var(--space-12);
}

.pt-0 {
    padding-top: 0;
}

.pb-0 {
    padding-bottom: 0;
}

/* ========== FLEX UTILITIES ========== */

.flex {
    display: flex;
}

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

.flex-wrap {
    flex-wrap: wrap;
}

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

.items-start {
    align-items: flex-start;
}

.items-end {
    align-items: flex-end;
}

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

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

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

.gap-4 {
    gap: var(--space-4);
}

.gap-6 {
    gap: var(--space-6);
}

.gap-8 {
    gap: var(--space-8);
}

/* ========== ANIMATIONS ========== */

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Animation Classes */
.animate-fade-in {
    animation: fadeIn var(--duration-slow) var(--ease-out);
}

.animate-fade-in-up {
    animation: fadeInUp var(--duration-slow) var(--ease-out);
}

.animate-fade-in-down {
    animation: fadeInDown var(--duration-slow) var(--ease-out);
}

.animate-slide-in-left {
    animation: slideInLeft var(--duration-slow) var(--ease-out);
}

.animate-slide-in-right {
    animation: slideInRight var(--duration-slow) var(--ease-out);
}

.animate-scale-in {
    animation: scaleIn var(--duration-slow) var(--ease-out);
}

/* Delay Classes */
.delay-100 {
    animation-delay: 100ms;
}

.delay-200 {
    animation-delay: 200ms;
}

.delay-300 {
    animation-delay: 300ms;
}

.delay-400 {
    animation-delay: 400ms;
}

.delay-500 {
    animation-delay: 500ms;
}

/* ========== OVERLAY ========== */

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

.overlay-dark {
    background-color: var(--overlay-dark);
}

.overlay-blue {
    background-color: var(--overlay-blue);
}

.overlay-gradient {
    background: linear-gradient(135deg,
            rgba(26, 37, 247, 0.9) 0%,
            rgba(15, 26, 159, 0.8) 100%);
}

/* ========== GRID PATTERN (Engineering Style) ========== */

.grid-pattern {
    position: relative;
}

.grid-pattern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 1;
}

/* ========== RESPONSIVE IMAGES ========== */

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

/* ========== VISIBILITY ========== */

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}

@media (max-width: 768px) {
    .hidden-mobile {
        display: none !important;
    }
}

@media (min-width: 769px) {
    .hidden-desktop {
        display: none !important;
    }
}

/* ========== LOADING STATE ========== */

.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.6;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px;
    height: 24px;
    margin: -12px 0 0 -12px;
    border: 3px solid var(--color-gray-300);
    border-top-color: var(--color-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ========== SCROLL REVEAL ========== */

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s var(--ease-out),
        transform 0.6s var(--ease-out);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ========== SELECTION ========== */

::selection {
    background-color: var(--color-blue);
    color: var(--color-white);
}

::-moz-selection {
    background-color: var(--color-blue);
    color: var(--color-white);
}

/* ========== SCROLLBAR ========== */

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--color-blue);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-blue-dark);
}