/**
 * ==============================================================================
 * BASE STYLES & REUSABLE UTILITIES
 * ==============================================================================
 * Inherits all CSS variables from theme.css.
 */

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

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

button {
    border: none;
    background: none;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
}

html, body {
    width: 100%;
    min-height: 100vh;
    background-color: var(--color-bg-body);
    background-image: 
        radial-gradient(circle at 85% 15%, rgba(0, 130, 251, 0.14) 0%, transparent 45%),
        radial-gradient(circle at 10% 85%, rgba(0, 90, 200, 0.09) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(10, 15, 25, 0.5) 0%, transparent 70%);
    background-attachment: fixed;
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--color-bg-body);
}
::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--radius-pill);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-border-hover);
}

/* Typography Helpers */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

h1 { font-size: 2.25rem; line-height: 1.2; }
h2 { font-size: 1.75rem; line-height: 1.25; }
h3 { font-size: 1.35rem; line-height: 1.3; }
h4 { font-size: 1.1rem; line-height: 1.4; }

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

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

/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1040px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.gap-4 { gap: 2rem; }

/* Grid Utilities */
.grid { display: grid; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }

@media (max-width: 768px) {
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

/* Card & Surface Components */
.card {
    background-color: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.card-interactive {
    cursor: pointer;
}
.card-interactive:hover {
    background-color: var(--color-bg-surface-elevated);
    border-color: var(--color-border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Standard Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.75rem 1.4rem;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-pill);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
    user-select: none;
    font-family: inherit;
}

.btn:disabled, .btn[disabled] {
    opacity: 0.45;
    cursor: not-allowed;
    pointer-events: none;
}

.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-accent-contrast);
    box-shadow: var(--shadow-sm);
}
.btn-primary:hover:not(:disabled) {
    background-color: var(--color-accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background-color: var(--color-bg-surface-elevated);
    color: var(--color-text-primary);
    border-color: var(--color-border);
}
.btn-secondary:hover:not(:disabled) {
    background-color: var(--color-bg-surface);
    border-color: var(--color-border-hover);
    color: var(--color-text-primary);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-text-primary);
    border-color: var(--color-border);
}
.btn-outline:hover:not(:disabled) {
    border-color: var(--color-border-hover);
    background-color: rgba(255, 255, 255, 0.04);
}

.btn-danger {
    background-color: var(--color-status-rejected);
    color: #ffffff;
}
.btn-danger:hover:not(:disabled) {
    filter: brightness(1.1);
}

.btn-success {
    background-color: var(--color-status-approved);
    color: #ffffff;
}
.btn-success:hover:not(:disabled) {
    filter: brightness(1.1);
}

.btn-white {
    background-color: #ffffff;
    color: #08090d;
    font-weight: 600;
}
.btn-white:hover:not(:disabled) {
    background-color: #e2e8f0;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.25);
}

.btn-sm {
    padding: 0.4rem 0.85rem;
    font-size: 0.825rem;
}

.btn-full {
    width: 100%;
}

/* Checklist Utilities */
.checklist-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin: 1.5rem 0;
}

.checklist-item {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    color: var(--color-text-primary);
    font-size: 0.95rem;
}

.checklist-icon {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: rgba(0, 130, 251, 0.15);
    border: 1px solid var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    flex-shrink: 0;
}

/* Status Indicators */
.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius-pill);
    font-size: 0.8rem;
    font-weight: 500;
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    flex-shrink: 0;
}
.status-dot-blue { background-color: var(--color-accent); box-shadow: 0 0 8px var(--color-accent); }
.status-dot-amber { background-color: var(--color-status-pending); box-shadow: 0 0 8px var(--color-status-pending); }
.status-dot-green { background-color: var(--color-status-approved); box-shadow: 0 0 8px var(--color-status-approved); }
.status-dot-red { background-color: var(--color-status-rejected); box-shadow: 0 0 8px var(--color-status-rejected); }

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.65rem;
    border-radius: var(--radius-pill);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.badge-pending {
    background-color: var(--color-status-pending-bg);
    color: var(--color-status-pending);
    border: 1px solid rgba(56, 189, 248, 0.25);
}

.badge-review {
    background-color: var(--color-status-review-bg);
    color: var(--color-status-review);
    border: 1px solid rgba(251, 191, 36, 0.25);
}

.badge-approved {
    background-color: var(--color-status-approved-bg);
    color: var(--color-status-approved);
    border: 1px solid rgba(52, 211, 153, 0.25);
}

.badge-rejected {
    background-color: var(--color-status-rejected-bg);
    color: var(--color-status-rejected);
    border: 1px solid rgba(248, 113, 113, 0.25);
}

/* Notice & Alert Boxes */
.notice-box {
    background-color: var(--color-bg-surface-subtle);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.notice-warning {
    background-color: rgba(251, 191, 36, 0.06);
    border-color: rgba(251, 191, 36, 0.25);
    color: #fde68a;
}
.notice-warning .notice-title {
    color: var(--color-status-review);
    font-weight: 600;
}

.notice-info {
    background-color: rgba(56, 189, 248, 0.06);
    border-color: rgba(56, 189, 248, 0.25);
    color: #bae6fd;
}

/* Form Inputs */
.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--color-bg-input);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.05);
}

/* Keyframe Animations */
@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(0.98); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes syncFlash {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.2; }
}

.animate-spin {
    animation: spin 1.2s linear infinite;
}

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

.animate-flash {
    animation: syncFlash 1.1s ease-in-out infinite;
}

/* Screen Reader / Hidden */
.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;
}