/**
 * HOPstack AI - Main Styles
 * Mobile-first, dark mode default with light mode toggle
 */

/* Color Variables - Dark Mode (Default) */
:root {
    --accent: #0A84D0;
    --accent-light: #3BA0E0;
    --accent-dark: #086BA8;
    
    /* Dark Mode Colors */
    --bg-primary: #1F252B;
    --bg-secondary: #2A3140;
    --bg-tertiary: #3A424A;
    --bg-card: #2A3140;
    
    --text-primary: #F5F7F9;
    --text-secondary: #9AA3AB;
    --text-muted: #6B7280;
    
    --border-color: rgba(245, 247, 249, 0.1);
    --border-hover: rgba(10, 132, 208, 0.3);
    
    /* Status Colors */
    --success: #34D399;
    --error: #F87171;
    --warning: #FBBF24;
    --info: #60A5FA;
    --purple: #A78BFA;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
    --transition-slow: 0.3s ease;
}

/* Light Mode */
[data-theme="light"] {
    --bg-primary: #F5F7F9;
    --bg-secondary: #FFFFFF;
    --bg-tertiary: #E5E7EB;
    --bg-card: #FFFFFF;
    
    --text-primary: #1F252B;
    --text-secondary: #3A424A;
    --text-muted: #9AA3AB;
    
    --border-color: rgba(0, 0, 0, 0.1);
    --border-hover: rgba(10, 132, 208, 0.4);
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
}

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

a:hover {
    color: var(--accent-light);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--accent-light);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-secondary);
}

.btn-outline {
    background: transparent;
    border: 1.5px solid var(--accent);
    color: var(--accent);
}

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

.btn-success {
    background: #059669;
    color: white;
}

.btn-success:hover:not(:disabled) {
    background: #047857;
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-danger {
    background: #DC2626;
    color: white;
}
.btn-danger:hover {
    background: #B91C1C;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all var(--transition-base);
}

.card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
}

.card-header {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
}

.card-body {
    padding: 0;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1.5px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.95rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(10, 132, 208, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.input-wrapper {
    position: relative;
}

.input-wrapper > i.field-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    z-index: 1;
    pointer-events: none;
}

.input-wrapper:has(> i.field-icon) .form-input,
.input-wrapper:has(> i.field-icon) .form-select {
    padding-left: 2.75rem;
}

/* Form Validation */
.form-group.has-error .form-input,
.form-group.has-error .form-select {
    border-color: var(--error);
    padding-right: 2.75rem;
}

.form-group.has-error .form-input:focus,
.form-group.has-error .form-select:focus {
    box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.15);
    border-color: var(--error);
}

.form-group.has-error .input-wrapper .form-input {
    padding-right: 2.75rem;
}

.form-group .field-error-icon {
    display: none;
    position: absolute;
    right: 0.875rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--error);
    font-size: 0.9rem;
    pointer-events: none;
}

.form-group.has-error .field-error-icon {
    display: block;
}

.form-group .field-error-msg {
    display: none;
    margin-top: 0.35rem;
    font-size: 0.8rem;
    color: var(--error);
    font-weight: 500;
}

.form-group.has-error .field-error-msg {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-primary {
    background: rgba(10, 132, 208, 0.15);
    color: var(--accent);
}

.badge-success {
    background: rgba(52, 211, 153, 0.15);
    color: var(--success);
}

.badge-warning {
    background: rgba(251, 191, 36, 0.15);
    color: var(--warning);
}

.badge-error {
    background: rgba(248, 113, 113, 0.15);
    color: var(--error);
}

.badge-info {
    background: rgba(96, 165, 250, 0.15);
    color: var(--info);
}

.badge-draft {
    background: rgba(107, 114, 128, 0.15);
    color: var(--text-muted);
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.alert i {
    margin-top: 0.125rem;
}

.alert-success {
    background: rgba(52, 211, 153, 0.1);
    border: 1px solid rgba(52, 211, 153, 0.3);
    color: var(--success);
}

.alert-error {
    background: rgba(248, 113, 113, 0.1);
    border: 1px solid rgba(248, 113, 113, 0.3);
    color: var(--error);
}

.alert-warning {
    background: rgba(251, 191, 36, 0.1);
    border: 1px solid rgba(251, 191, 36, 0.3);
    color: var(--warning);
}

.alert-info {
    background: rgba(96, 165, 250, 0.1);
    border: 1px solid rgba(96, 165, 250, 0.3);
    color: var(--info);
}

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

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

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

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

.text-primary {
    color: var(--accent);
}

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

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

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.flex {
    display: flex;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }

/* Page Loading Bar */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--accent);
    z-index: 9999;
    transition: opacity 0.3s ease;
    animation: pageLoad 0.8s ease-out forwards;
}

@keyframes pageLoad {
    0%   { width: 0; }
    30%  { width: 40%; }
    60%  { width: 70%; }
    80%  { width: 85%; }
    100% { width: 100%; }
}

.page-loader.loaded {
    opacity: 0;
}

/* Breadcrumbs */
.breadcrumb-bar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0.625rem 1rem;
}

.breadcrumb-content {
    max-width: 1200px;
    margin: 0 auto;
}

.breadcrumbs {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 0;
    flex-wrap: wrap;
    margin: 0;
    padding: 0;
}

.breadcrumb-item {
    display: inline-flex;
    align-items: center;
    font-size: 0.85rem;
}

.breadcrumb-item a {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
    padding: 0.15rem 0;
}

.breadcrumb-item a:hover {
    color: var(--accent);
}

.breadcrumb-item a i {
    font-size: 0.8rem;
}

.breadcrumb-item.active span {
    color: var(--text-primary);
    font-weight: 600;
}

.breadcrumb-item.active i {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-right: 0.35rem;
}

.breadcrumb-sep {
    display: inline-flex;
    align-items: center;
    padding: 0 0.5rem;
    color: var(--text-muted);
    font-size: 0.6rem;
}

@media (max-width: 640px) {
    .breadcrumb-bar {
        padding: 0.5rem 0.75rem;
    }
    .breadcrumb-item {
        font-size: 0.8rem;
    }
    .breadcrumb-sep {
        padding: 0 0.35rem;
    }
}

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

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in {
    animation: fadeIn 0.3s ease;
}

/* ─── Confirmation Modal ─────────────────────────────────────────── */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    padding: 1rem;
}

.modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.modal-overlay .modal {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 420px;
    transform: translateY(20px) scale(0.95);
    transition: transform var(--transition-base);
}

.modal-overlay.show .modal {
    transform: translateY(0) scale(1);
}

.modal-header {
    padding: 1.5rem 1.5rem 0;
    text-align: center;
}

.modal-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 1rem;
}

.modal-icon.icon-accent {
    background: rgba(10, 132, 208, 0.15);
    color: var(--accent);
}

.modal-icon.icon-danger {
    background: rgba(220, 38, 38, 0.15);
    color: #DC2626;
}

.modal-icon.icon-warning {
    background: rgba(245, 158, 11, 0.15);
    color: #F59E0B;
}

.modal-header h3 {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.modal-body {
    padding: 1rem 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    text-align: center;
}

.modal-credit-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-top: 0.75rem;
    font-size: 0.9rem;
}

.modal-credit-info .label {
    color: var(--text-secondary);
}

.modal-credit-info .value {
    font-weight: 700;
    color: var(--accent);
}

.modal-footer {
    padding: 1rem 1.5rem 1.5rem;
    display: flex;
    gap: 0.75rem;
}

.modal-footer .btn {
    flex: 1;
}

/* Responsive */
@media (max-width: 640px) {
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
}