/* ================================
   Base Styles, Reset & Typography
   ================================ */

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-gray-dark);
    background-color: var(--color-white);
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
    padding-left: var(--sidebar-width);
    transition: padding-left var(--transition-base);
}

body.sidebar-collapsed {
    padding-left: var(--sidebar-collapsed-width);
}

@media (max-width: 1200px) {
    body {
        padding-left: 0;
        padding-top: var(--mobile-header-height);
    }
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-secondary);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
}

h1 { 
    font-size: var(--font-size-5xl); 
    letter-spacing: var(--letter-spacing-tight);
}

h2 { 
    font-size: var(--font-size-4xl); 
    letter-spacing: var(--letter-spacing-tight);
}

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

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

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

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

p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-gray-700);
    line-height: var(--line-height-relaxed);
}

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

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

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

/* ============================================
   IMAGES & MEDIA
   ============================================ */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

svg {
    display: block;
    max-width: 100%;
}

/* ============================================
   LISTS
   ============================================ */
ul, ol {
    list-style: none;
}

/* ============================================
   FORMS
   ============================================ */
button {
    font-family: inherit;
    font-size: inherit;
    border: none;
    background: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
    border: var(--border-width-base) solid var(--color-gray-300);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    transition: all var(--transition-fast);
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-20);
}

input::placeholder,
textarea::placeholder {
    color: var(--color-gray-500);
}

/* ============================================
   SCROLLBAR STYLING
   ============================================ */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--color-gray-400);
    border-radius: var(--radius-full);
    transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-500);
}

/* Firefox scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--color-gray-400) var(--color-gray-100);
}

/* ============================================
   TEXT SELECTION
   ============================================ */
::selection {
    background-color: var(--color-primary);
    color: var(--color-dark);
}

::-moz-selection {
    background-color: var(--color-primary);
    color: var(--color-dark);
}

/* ============================================
   UTILITIES
   ============================================ */
.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;
}

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

.font-primary { font-family: var(--font-primary); }
.font-secondary { font-family: var(--font-secondary); }

.font-light { font-weight: var(--font-weight-light); }
.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

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

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

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

/* ============================================
   REDUCED MOTION
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}