/**
 * Common Styles
 * Crisis Chat Application
 * Base styles, components, and utilities shared across all pages
 */

/* CSS Reset / Normalize */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

body {
    margin: 0;
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-base);
    color: var(--color-gray-900);
    background-color: var(--color-gray-100);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin-top: 0;
    margin-bottom: var(--spacing-4);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
}

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-base); }
h6 { font-size: var(--font-size-sm); }

p {
    margin-top: 0;
    margin-bottom: var(--spacing-4);
}

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

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

/* Forms */
label {
    display: inline-block;
    margin-bottom: var(--spacing-2);
    font-weight: var(--font-weight-medium);
}

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

input[type="text"],
input[type="email"],
input[type="password"],
input[type="tel"],
input[type="url"],
textarea {
    display: block;
    width: 100%;
    height: var(--input-height);
    padding: var(--spacing-2) var(--input-padding-x);
    font-size: var(--font-size-base);
    color: var(--color-gray-900);
    background-color: var(--color-white);
    border: 1px solid var(--input-border-color);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

textarea {
    height: auto;
    min-height: 80px;
    resize: vertical;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--input-focus-border-color);
    box-shadow: var(--input-focus-shadow);
}

input:disabled,
textarea:disabled,
select:disabled {
    background-color: var(--color-gray-200);
    cursor: not-allowed;
    opacity: 0.7;
}

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

/* Checkbox */
.checkbox-wrapper {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-2);
}

.checkbox-wrapper input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    margin-top: 0.125rem;
    cursor: pointer;
    accent-color: var(--color-primary);
}

.checkbox-wrapper label {
    margin-bottom: 0;
    font-weight: var(--font-weight-normal);
    cursor: pointer;
}

/* Radio Buttons */
.radio-group {
    display: flex;
    gap: var(--spacing-4);
    margin-top: var(--spacing-2);
}

.radio-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    margin-bottom: 0;
    font-weight: var(--font-weight-normal);
    cursor: pointer;
}

.radio-label input[type="radio"] {
    width: 1.25rem;
    height: 1.25rem;
    cursor: pointer;
    accent-color: var(--color-primary);
}

/* Location Question */
.location-question {
    margin-bottom: var(--spacing-4);
}

.location-question > label {
    display: block;
    margin-bottom: var(--spacing-2);
}

.location-notice {
    margin-top: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-4);
    background-color: #fff3cd;
    border: 1px solid #ffeeba;
    border-radius: var(--radius-md);
    color: var(--color-warning-dark);
}

.location-notice p {
    margin: 0;
    font-size: var(--font-size-sm);
}

.location-notice.hidden {
    display: none;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--btn-padding-y) var(--btn-padding-x);
    font-family: inherit;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-base);
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.btn:focus {
    outline: none;
    box-shadow: var(--input-focus-shadow);
}

.btn:disabled {
    opacity: 0.65;
    cursor: not-allowed;
}

/* Button Variants */
.btn-primary {
    color: var(--color-white);
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}

.btn-secondary {
    color: var(--color-white);
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--color-secondary-dark);
    border-color: var(--color-secondary-dark);
}

.btn-success {
    color: var(--color-white);
    background-color: var(--color-success);
    border-color: var(--color-success);
}

.btn-success:hover:not(:disabled) {
    background-color: var(--color-success-dark);
    border-color: var(--color-success-dark);
}

.btn-danger {
    color: var(--color-white);
    background-color: var(--color-danger);
    border-color: var(--color-danger);
}

.btn-danger:hover:not(:disabled) {
    background-color: var(--color-danger-dark);
    border-color: var(--color-danger-dark);
}

.btn-warning {
    color: var(--color-gray-900);
    background-color: var(--color-warning);
    border-color: var(--color-warning);
}

.btn-warning:hover:not(:disabled) {
    background-color: var(--color-warning-dark);
    border-color: var(--color-warning-dark);
}

.btn-outline {
    color: var(--color-primary);
    background-color: transparent;
    border-color: var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
    color: var(--color-white);
    background-color: var(--color-primary);
}

/* Button Sizes */
.btn-sm {
    padding: var(--btn-padding-y-sm) var(--btn-padding-x-sm);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--btn-padding-y-lg) var(--btn-padding-x-lg);
    font-size: var(--font-size-lg);
}

.btn-block {
    display: flex;
    width: 100%;
}

/* Cards */
.card {
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.card-header {
    padding: var(--spacing-4);
    border-bottom: 1px solid var(--color-gray-200);
}

.card-body {
    padding: var(--spacing-4);
}

.card-footer {
    padding: var(--spacing-4);
    border-top: 1px solid var(--color-gray-200);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-1) var(--spacing-2);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    line-height: 1;
    border-radius: var(--radius-full);
}

.badge-primary {
    color: var(--color-white);
    background-color: var(--color-primary);
}

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

.badge-danger {
    color: var(--color-white);
    background-color: var(--color-danger);
}

.badge-warning {
    color: var(--color-gray-900);
    background-color: var(--color-warning);
}

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    border: 3px solid var(--color-gray-300);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spinner-rotate 0.8s linear infinite;
}

.spinner-sm {
    width: 1rem;
    height: 1rem;
    border-width: 2px;
}

.spinner-lg {
    width: 3rem;
    height: 3rem;
    border-width: 4px;
}

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

/* Loading Overlay */
.loading-overlay {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-4);
    padding: var(--spacing-8);
    text-align: center;
}

.loading-overlay p {
    margin: 0;
    color: var(--color-gray-600);
}

/* Alert / Notification */
.alert {
    padding: var(--spacing-3) var(--spacing-4);
    margin-bottom: var(--spacing-4);
    border-radius: var(--radius-md);
}

.alert-success {
    color: var(--color-success-dark);
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
}

.alert-danger {
    color: var(--color-danger-dark);
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    color: var(--color-warning-dark);
    background-color: #fff3cd;
    border: 1px solid #ffeeba;
}

.alert-info {
    color: var(--color-info-dark);
    background-color: #d1ecf1;
    border: 1px solid #bee5eb;
}

/* Visually Hidden (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: 0;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-muted { color: var(--color-gray-600); }

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

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

.m-0 { margin: 0; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-4 { margin-top: var(--spacing-4); }
.mb-4 { margin-bottom: var(--spacing-4); }

.p-0 { padding: 0; }
.p-4 { padding: var(--spacing-4); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-inline-flex { display: inline-flex; }

.flex-column { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.gap-2 { gap: var(--spacing-2); }
.gap-4 { gap: var(--spacing-4); }

.w-100 { width: 100%; }
.h-100 { height: 100%; }

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

/* Responsive Utilities */
@media (max-width: 576px) {
    .d-sm-none { display: none; }
    .d-sm-block { display: block; }
}

@media (max-width: 768px) {
    .d-md-none { display: none; }
    .d-md-block { display: block; }
}

@media (max-width: 992px) {
    .d-lg-none { display: none; }
    .d-lg-block { display: block; }
}