/* ==========================================================================
   Base Styles - Core styles and utilities
   ========================================================================== */

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    color: var(--text-primary);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-md); }
h6 { font-size: var(--font-size-sm); }

p {
    margin-bottom: var(--spacing-md);
}

small {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

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

/* Links */
a:hover {
    color: var(--color-primary);
}

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

.page {
    padding: var(--spacing-lg);
    min-height: calc(100vh - var(--navbar-height));
}

/* 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-end {
    justify-content: flex-end;
}

.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

.flex-1 { flex: 1; }
.flex-shrink-0 { flex-shrink: 0; }

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

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

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

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

/* Spacing utilities */
.m-0 { margin: 0; }
.m-xs { margin: var(--spacing-xs); }
.m-sm { margin: var(--spacing-sm); }
.m-md { margin: var(--spacing-md); }
.m-lg { margin: var(--spacing-lg); }

.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.p-0 { padding: 0; }
.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }

/* Text utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-md { font-size: var(--font-size-md); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }

.text-muted { color: var(--text-muted); }
.text-primary { color: var(--color-primary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }

.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); }

/* Visibility */
.hidden {
    display: none !important;
}

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

/* Width utilities */
.w-full { width: 100%; }
.w-auto { width: auto; }

/* Background utilities */
.bg-white { background-color: var(--bg-primary); }
.bg-gray { background-color: var(--bg-secondary); }

/* Border utilities */
.border {
    border: 1px solid var(--border-color);
}

.border-t {
    border-top: 1px solid var(--border-color);
}

.border-b {
    border-bottom: 1px solid var(--border-color);
}

.rounded { border-radius: var(--radius-md); }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadow utilities */
.shadow { box-shadow: var(--shadow-md); }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-lg { box-shadow: var(--shadow-lg); }

/* Cursor */
.cursor-pointer { cursor: pointer; }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

/* Responsive utilities */
@media (max-width: 640px) {
    .sm\:hidden { display: none !important; }
    .sm\:flex-col { flex-direction: column; }
    .sm\:text-center { text-align: center; }
}

@media (min-width: 641px) {
    .md\:flex { display: flex; }
    .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
    .lg\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Theme transition */
body {
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* App container */
#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

#page-content {
    flex: 1;
}

/* Loading spinner */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-gray-300);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner-sm {
    width: 14px;
    height: 14px;
    border-width: 2px;
}

.spinner-lg {
    width: 40px;
    height: 40px;
    border-width: 3px;
}

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

/* Page loader */
.page-loader {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
}

/* Spinner overlay */
.spinner-overlay {
    position: absolute;
    inset: 0;
    background: var(--spinner-overlay-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    border-radius: inherit;
}

/* Button loading state */
.btn-loading {
    opacity: 0.7;
    cursor: not-allowed;
    pointer-events: none;
}

.btn-loading .spinner {
    vertical-align: middle;
    margin-right: var(--spacing-xs);
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 3rem;
    line-height: 1;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.4s ease-out;
}

.empty-state h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-full);
    background-color: var(--color-gray-200);
    color: var(--text-secondary);
}

.badge-success {
    background-color: var(--badge-success-bg);
    color: var(--badge-success-text);
}

.badge-warning {
    background-color: var(--badge-warning-bg);
    color: var(--badge-warning-text);
}

.badge-error {
    background-color: var(--badge-error-bg);
    color: var(--badge-error-text);
}

.badge-info {
    background-color: var(--badge-info-bg);
    color: var(--badge-info-text);
}

/* Micro-animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    animation: fadeInUp 0.4s ease-out both;
}

.animate-in:nth-child(1) { animation-delay: 0s; }
.animate-in:nth-child(2) { animation-delay: 0.06s; }
.animate-in:nth-child(3) { animation-delay: 0.12s; }
.animate-in:nth-child(4) { animation-delay: 0.18s; }
.animate-in:nth-child(5) { animation-delay: 0.24s; }
.animate-in:nth-child(6) { animation-delay: 0.30s; }

/* Respect reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    .animate-in,
    .landing-hero-card {
        animation: none !important;
    }
}

/* Amount display */
.amount {
    font-weight: var(--font-weight-semibold);
    font-family: var(--font-family-mono);
}

.amount-positive {
    color: var(--color-success);
}

.amount-negative {
    color: var(--color-error);
}

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