/* ============================================
   BASE STYLES — Reset & Foundation
   ============================================ */

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: var(--font-regular);
    line-height: var(--leading-relaxed);
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    color: var(--color-text);
}

h1 {
    font-size: var(--text-4xl);
}

h2 {
    font-size: var(--text-3xl);
}

h3 {
    font-size: var(--text-2xl);
}

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

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

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

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

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

ul,
ol {
    list-style: none;
}

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

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

::selection {
    background: var(--color-primary);
    color: var(--color-text-inverse);
}

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

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

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

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

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

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

.flex {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

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

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

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

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

.text-sm {
    font-size: var(--text-sm);
}

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

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

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

.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

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

.section-title {
    font-size: var(--text-3xl);
    font-weight: var(--font-extrabold);
    margin-bottom: var(--space-2);
}

.section-subtitle {
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
    margin-bottom: var(--space-10);
}

.divider {
    height: 1px;
    background: var(--color-border);
    border: none;
    margin: var(--space-8) 0;
}

/* ---- Animations ---- */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

@keyframes slideIn {
    from {
        transform: translateX(-100%);
    }

    to {
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }

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

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

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

.animate-fade-in {
    animation: fadeIn var(--transition-base) both;
}

.animate-fade-in-up {
    animation: fadeInUp var(--transition-slow) both;
}

.animate-scale-in {
    animation: scaleIn var(--transition-base) both;
}

/* Staggered children */
.stagger>* {
    animation: fadeInUp 0.4s ease both;
}

.stagger>*:nth-child(1) {
    animation-delay: 0.05s;
}

.stagger>*:nth-child(2) {
    animation-delay: 0.1s;
}

.stagger>*:nth-child(3) {
    animation-delay: 0.15s;
}

.stagger>*:nth-child(4) {
    animation-delay: 0.2s;
}

.stagger>*:nth-child(5) {
    animation-delay: 0.25s;
}

.stagger>*:nth-child(6) {
    animation-delay: 0.3s;
}

.stagger>*:nth-child(7) {
    animation-delay: 0.35s;
}

.stagger>*:nth-child(8) {
    animation-delay: 0.4s;
}

.stagger>*:nth-child(9) {
    animation-delay: 0.45s;
}

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

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

@media (max-width: 768px) {
    html {
        font-size: 15px;
    }

    .container {
        padding: 0 var(--space-4);
    }

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

    h1 {
        font-size: var(--text-3xl);
    }

    h2 {
        font-size: var(--text-2xl);
    }

    .section {
        padding: var(--space-10) 0;
    }

    .hide-mobile {
        display: none !important;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
}