/*
 * 4What Digital - Cinematic Brutalism Design System
 * Based on inspo.html style guide
 */

/* ============================================
   CSS VARIABLES
   ============================================ */
:root {
    /* Brand Colors */
    --brand-red: #be1e2d;
    --brand-red-light: rgba(190, 30, 45, 0.1);
    --brand-red-glow: rgba(190, 30, 45, 0.5);

    /* Background Colors */
    --dark-bg: #050505;
    --dark-bg-secondary: #0a0a0a;

    /* Glass Effect */
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-bg: rgba(15, 15, 15, 0.7);
    --glass-bg-hover: rgba(255, 255, 255, 0.05);

    /* Grid */
    --grid-color: rgba(190, 30, 45, 0.05);

    /* Text Colors */
    --text-primary: #e5e5e5;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;

    /* Accent Colors for Services */
    --accent-orange: #f97316;
    --accent-green: #22c55e;
    --accent-blue: #3b82f6;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s cubic-bezier(0.19, 1, 0.22, 1);
    --transition-slow: 0.5s cubic-bezier(0.19, 1, 0.22, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--dark-bg);
    color: var(--text-primary);
    font-family: 'Manrope', sans-serif;
    line-height: 1.6;
    cursor: none;
    overflow-x: hidden;
    min-height: 100vh;
}

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

/* ============================================
   TYPOGRAPHY
   ============================================ */
.font-display {
    font-family: 'Syncopate', sans-serif;
    letter-spacing: -0.05em;
}

.font-mono {
    font-family: 'JetBrains Mono', monospace;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Syncopate', sans-serif;
    letter-spacing: -0.05em;
    line-height: 1.1;
}

h1 { font-size: clamp(2.5rem, 8vw, 6rem); }
h2 { font-size: clamp(1.75rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.75rem); }
h4 { font-size: clamp(1rem, 1.5vw, 1.25rem); }

p {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

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

/* ============================================
   BACKGROUND EFFECTS
   ============================================ */
.cyber-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-image:
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: -2;
    pointer-events: none;
}

.pulse-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(190, 30, 45, 0.03), transparent 60%);
    z-index: -1;
    animation: breathe 8s infinite ease-in-out;
    pointer-events: none;
}

@keyframes breathe {
    0%, 100% {
        opacity: 0.2;
        transform: scale(1);
    }
    50% {
        opacity: 0.6;
        transform: scale(1.1);
    }
}

.noise-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 50;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* ============================================
   CUSTOM CURSOR (Circular - from inspo.html)
   ============================================ */
.cursor-dot,
.cursor-outline {
    position: fixed;
    top: 0;
    left: 0;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    z-index: 9999;
    pointer-events: none;
}

.cursor-dot {
    width: 8px;
    height: 8px;
    background-color: var(--brand-red);
}

.cursor-outline {
    width: 40px;
    height: 40px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    transition: width 0.2s, height 0.2s, border-color 0.2s, background-color 0.2s;
}

/* Hover State for Cursor */
body.hovering .cursor-outline {
    width: 60px;
    height: 60px;
    border-color: var(--brand-red);
    background-color: rgba(190, 30, 45, 0.1);
    mix-blend-mode: screen;
}

/* Mobile: Show default cursor */
@media (max-width: 768px) {
    body { cursor: auto; }
    .cursor-dot,
    .cursor-outline { display: none; }
}

/* ============================================
   GLASS PANELS
   ============================================ */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    position: relative;
    overflow: hidden;
    transition:
        background var(--transition-medium),
        border-color var(--transition-medium);
}

.glass-panel::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--brand-red);
    opacity: 0;
    transform: translateY(-100%);
    transition: all var(--transition-slow);
    box-shadow: 0 0 10px var(--brand-red);
}

.glass-panel:hover::after {
    opacity: 1;
    transform: translateY(0);
}

.glass-panel:hover {
    background: var(--glass-bg-hover);
    border-color: var(--brand-red);
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-logo-dot {
    width: 0.75rem;
    height: 0.75rem;
    background: var(--brand-red);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.nav-logo-text {
    font-family: 'Syncopate', sans-serif;
    font-weight: 700;
    font-size: 1.125rem;
    letter-spacing: -0.02em;
}

.nav-logo-text span {
    color: var(--brand-red);
}

.nav-links {
    display: none;
    gap: 3rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.625rem;
    letter-spacing: 0.2em;
    color: var(--text-muted);
}

@media (min-width: 768px) {
    .nav-links { display: flex; }
}

.nav-link {
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--brand-red);
    transition: width var(--transition-medium);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-cta {
    padding: 0.5rem 1.25rem;
    border: 1px solid rgba(190, 30, 45, 0.5);
    color: var(--brand-red);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    background: transparent;
    cursor: none;
    transition: all var(--transition-fast);
}

.nav-cta:hover {
    background: var(--brand-red);
    color: black;
    border-color: var(--brand-red);
}

/* Mobile Menu */
.nav-mobile-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

@media (min-width: 768px) {
    .nav-mobile-toggle { display: none; }
}

.nav-mobile-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-family: 'Syncopate', sans-serif;
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    cursor: none;
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--brand-red);
    color: white;
    border: none;
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: white;
    transform: translateX(-100%);
    transition: transform var(--transition-medium);
    mix-blend-mode: overlay;
}

.btn-primary:hover::before {
    transform: translateX(0);
}

.btn-primary:hover {
    letter-spacing: 0.2em;
}

.btn-secondary {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    border-color: var(--brand-red);
    color: var(--text-primary);
}

.btn-ghost {
    background: transparent;
    color: var(--brand-red);
    border: 1px solid var(--brand-red);
    padding: 0.75rem 1.5rem;
}

.btn-ghost:hover {
    background: var(--brand-red);
    color: black;
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 6rem 0;
}

.section-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 3rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.section-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--brand-red);
    margin-bottom: 1rem;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 6rem;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
}

@media (min-width: 768px) {
    .hero-content {
        grid-template-columns: 2fr 1fr;
    }
}

.hero-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--brand-red);
    margin-bottom: 1rem;
}

.hero-title {
    text-transform: uppercase;
    line-height: 0.85;
    margin-bottom: 2rem;
}

.hero-title-gradient {
    background: linear-gradient(to right, white, #9ca3af, #4b5563);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    max-width: 36rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    line-height: 1.8;
    color: var(--text-secondary);
    padding-left: 1.5rem;
    border-left: 2px solid var(--brand-red);
}

.hero-cta {
    margin-top: 2rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* ============================================
   SERVICE CARDS
   ============================================ */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.service-card {
    padding: 2rem;
    transition: all var(--transition-slow);
}

.service-card:hover {
    background: var(--glass-bg-hover);
}

.service-card-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    margin-bottom: 1rem;
}

.service-card-tag.orange { color: var(--accent-orange); }
.service-card-tag.red { color: var(--brand-red); }
.service-card-tag.green { color: var(--accent-green); }

.service-card-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    transition: color var(--transition-fast);
}

.service-card:hover .service-card-title.orange { color: var(--accent-orange); }
.service-card:hover .service-card-title.red { color: var(--brand-red); }
.service-card:hover .service-card-title.green { color: var(--accent-green); }

.service-card-description {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.service-card-divider {
    height: 1px;
    width: 100%;
    background: rgba(255, 255, 255, 0.1);
    transition: background var(--transition-fast);
}

.service-card:hover .service-card-divider.orange { background: rgba(249, 115, 22, 0.5); }
.service-card:hover .service-card-divider.red { background: rgba(190, 30, 45, 0.5); }
.service-card:hover .service-card-divider.green { background: rgba(34, 197, 94, 0.5); }

.service-card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.service-card-link:hover {
    color: var(--brand-red);
}

.service-card-link svg {
    width: 1rem;
    height: 1rem;
    transition: transform var(--transition-fast);
}

.service-card-link:hover svg {
    transform: translateX(4px);
}

/* ============================================
   PHILOSOPHY / PROBLEM SECTION
   ============================================ */
.philosophy {
    position: relative;
}

.philosophy-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

@media (min-width: 768px) {
    .philosophy-content {
        grid-template-columns: 1fr 1fr;
    }
}

.philosophy-highlight {
    font-family: 'Syncopate', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--brand-red);
    margin: 2rem 0;
}

/* ============================================
   PIPELINE VISUALIZATION
   ============================================ */
.pipeline-viz {
    padding: 2.5rem;
}

.pipeline {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
}

.pipeline-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1.25rem 1rem;
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s ease, transform 0.5s ease, box-shadow 0.5s ease;
}

.pipeline-node.active {
    opacity: 1;
    transform: translateY(0);
}

.pipeline-node-icon {
    width: 56px;
    height: 56px;
    border: 1px solid rgba(190, 30, 45, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    transition: border-color 0.5s ease, color 0.5s ease, box-shadow 0.5s ease;
}

.pipeline-node.active .pipeline-node-icon {
    border-color: var(--brand-red);
    color: var(--brand-red);
    box-shadow: 0 0 24px rgba(190, 30, 45, 0.3), inset 0 0 12px rgba(190, 30, 45, 0.1);
}

.pipeline-node-label {
    font-family: 'Syncopate', sans-serif;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.35rem;
    transition: color 0.5s ease;
}

.pipeline-node.active .pipeline-node-label {
    color: var(--text-primary);
}

.pipeline-node-detail {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.4;
    max-width: 220px;
    transition: color 0.5s ease;
}

.pipeline-node.active .pipeline-node-detail {
    color: var(--text-secondary);
}

/* Connector line + pulse */
.pipeline-connector {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.pipeline-connector.active {
    opacity: 1;
}

.pipeline-line {
    width: 1px;
    height: 100%;
    background: rgba(190, 30, 45, 0.2);
}

.pipeline-connector.active .pipeline-line {
    background: linear-gradient(to bottom, var(--brand-red), rgba(190, 30, 45, 0.2));
}

.pipeline-pulse {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--brand-red);
    box-shadow: 0 0 12px var(--brand-red-glow);
    opacity: 0;
}

.pipeline-connector.active .pipeline-pulse {
    animation: pipelinePulseVertical 1.5s ease-in-out infinite;
}

@keyframes pipelinePulseVertical {
    0% { top: 0; opacity: 0; }
    20% { opacity: 1; }
    80% { opacity: 1; }
    100% { top: calc(100% - 8px); opacity: 0; }
}

/* Result block */
.pipeline-result {
    margin-top: 2rem;
    padding: 1.5rem;
    background: rgba(190, 30, 45, 0.08);
    border-left: 3px solid var(--brand-red);
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.pipeline-result.active {
    opacity: 1;
    transform: translateY(0);
}

.pipeline-result-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--brand-red);
    margin-bottom: 0.5rem;
}

.pipeline-result-value {
    font-family: 'Syncopate', sans-serif;
    font-size: 2rem;
    font-weight: 700;
}

/* Desktop: horizontal pipeline */
@media (min-width: 768px) {
    .pipeline {
        flex-direction: row;
        align-items: flex-start;
    }

    .pipeline-node {
        flex: 1;
    }

    .pipeline-connector {
        width: 60px;
        height: auto;
        min-height: 56px;
        align-self: flex-start;
        margin-top: 14px;
        flex-shrink: 0;
    }

    .pipeline-line {
        width: 100%;
        height: 1px;
    }

    .pipeline-connector.active .pipeline-line {
        background: linear-gradient(to right, var(--brand-red), rgba(190, 30, 45, 0.2));
    }

    .pipeline-connector.active .pipeline-pulse {
        animation: pipelinePulseHorizontal 1.5s ease-in-out infinite;
    }

    @keyframes pipelinePulseHorizontal {
        0% { left: 0; opacity: 0; }
        20% { opacity: 1; }
        80% { opacity: 1; }
        100% { left: calc(100% - 8px); opacity: 0; }
    }
}

/* ============================================
   STATS
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    text-align: center;
}

.stat-item {
    padding: 1.5rem;
}

.stat-value {
    font-family: 'Syncopate', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--brand-red);
}

.stat-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.625rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-top: 0.5rem;
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta-section {
    position: relative;
    padding: 6rem 2rem;
    text-align: center;
    border-top: 1px solid rgba(190, 30, 45, 0.3);
    border-bottom: 1px solid rgba(190, 30, 45, 0.3);
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--brand-red);
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.cta-section:hover::before {
    opacity: 0.05;
}

.cta-tag {
    display: inline-block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--brand-red);
    border: 1px solid var(--brand-red);
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    margin-bottom: 1.5rem;
    background: rgba(0, 0, 0, 0.5);
}

.cta-title {
    font-size: clamp(2rem, 5vw, 4rem);
    margin-bottom: 1.5rem;
}

.cta-subtitle {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.cta-link {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    letter-spacing: 0.15em;
    color: var(--text-secondary);
    border-bottom: 1px solid transparent;
    padding-bottom: 0.25rem;
    transition: all var(--transition-fast);
}

.cta-link:hover {
    color: var(--text-primary);
    border-color: var(--text-primary);
}

/* ============================================
   LOGO GRID
   ============================================ */
.logo-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    padding: 2rem 0;
    opacity: 0.6;
}

.logo-grid img {
    height: 2rem;
    width: auto;
    filter: grayscale(100%) brightness(200%);
    transition: all var(--transition-fast);
}

.logo-grid img:hover {
    filter: grayscale(0%) brightness(100%);
    opacity: 1;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    margin-top: 6rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 3rem 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.625rem;
    color: var(--text-muted);
}

.footer-tag {
    opacity: 0.5;
}

/* ============================================
   METHODOLOGY SECTION
   ============================================ */
.methodology-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.methodology-item {
    padding: 2rem;
}

.methodology-number {
    font-family: 'Syncopate', sans-serif;
    font-size: 3rem;
    font-weight: 700;
    color: var(--brand-red);
    opacity: 0.3;
    margin-bottom: 1rem;
}

.methodology-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.methodology-description {
    font-size: 0.875rem;
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-family: 'Manrope', sans-serif;
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--brand-red);
    background: rgba(190, 30, 45, 0.05);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-glow {
    text-shadow: 0 0 20px var(--brand-red-glow);
}

.text-red { color: var(--brand-red); }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }

.hidden { display: none; }

@media (min-width: 768px) {
    .md\:block { display: block; }
    .md\:flex { display: flex; }
    .md\:grid { display: grid; }
}