/* ============================================
   BASE STYLES
   Reset, Typography, Layout Utilities
   ============================================ */

/* ========== CSS Reset ========== */

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-body);
    font-weight: var(--font-weight-regular);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-primary);
    background-color: var(--color-bg-white);
    overflow-x: hidden;
}

/* Remove default list styles */
ul, ol {
    list-style: none;
}

/* Remove default link styles */
a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

/* Remove default button styles */
button {
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
}

/* Make images responsive */
img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

/* Remove default form element styles */
input, button, textarea, select {
    font: inherit;
}

/* Improve text rendering */
p, h1, h2, h3, h4, h5, h6 {
    overflow-wrap: break-word;
}


/* ========== Typography ========== */

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-snug);
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
}

h1 {
    font-size: var(--font-size-h1);
    font-weight: var(--font-weight-black);
    line-height: var(--line-height-tight);
}

h2 {
    font-size: var(--font-size-h2);
    font-weight: var(--font-weight-bold);
}

h3 {
    font-size: var(--font-size-h3);
    font-weight: var(--font-weight-semibold);
}

h4 {
    font-size: var(--font-size-h4);
    font-weight: var(--font-weight-semibold);
}

p {
    margin-bottom: var(--space-3);
    line-height: var(--line-height-relaxed);
}

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

em {
    font-style: italic;
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
}

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

/* Links */
a:hover {
    opacity: 0.8;
}

a:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
    border-radius: var(--radius-sm);
}

/* Gradient text effect */
.gradient-text {
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Link with arrow */
.link-arrow {
    display: inline-flex;
    align-items: center;
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
    transition: transform var(--transition-base);
}

.link-arrow:hover {
    transform: translateX(4px);
}


/* ========== Layout Utilities ========== */

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

.container-narrow {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.container-wide {
    max-width: var(--container-wide);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Section spacing */
section {
    padding: var(--section-padding);
}

/* Text alignment */
.text-center {
    text-align: center;
}

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

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

/* Flex utilities */
.flex {
    display: flex;
}

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

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

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

.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Grid utilities */
.grid {
    display: grid;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
}

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

/* Responsive grid */
@media (max-width: 1023px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 767px) {
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
}


/* ========== Visibility Utilities ========== */

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}

/* Screen reader only */
.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;
}

/* Responsive visibility */
@media (max-width: 767px) {
    .hide-mobile {
        display: none !important;
    }
}

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


/* ========== Spacing Utilities ========== */

.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }


/* ========== Icon Styles ========== */

.icon {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
}

.icon-lg {
    width: 48px;
    height: 48px;
}

.icon-xl {
    width: 64px;
    height: 64px;
}

svg {
    display: inline-block;
    vertical-align: middle;
}


/* ========== Accessibility ========== */

/* Focus styles */
*:focus {
    outline: none;
}

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

/* Skip to content link */
.skip-to-content {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-text-white);
    padding: var(--space-2) var(--space-3);
    z-index: var(--z-modal);
    transition: top var(--transition-base);
}

.skip-to-content:focus {
    top: 0;
}


/* ========== Section Header Styles ========== */

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-10);
}

.section-title {
    font-size: var(--font-size-h2);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-3);
    color: var(--color-text-primary);
}

.section-subtitle {
    font-size: var(--font-size-large);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
}


/* ========== Responsive Adjustments ========== */

@media (max-width: 1023px) {
    .section-header {
        margin-bottom: var(--space-8);
    }
}

@media (max-width: 767px) {
    .section-header {
        margin-bottom: var(--space-6);
    }

    .section-title {
        font-size: var(--font-size-h2);
    }

    .section-subtitle {
        font-size: var(--font-size-body);
    }
}