/* Root Variables */
:root {
    --primary-color: #6f4ef3; /* brighter violet */
    --secondary-color: #4b3bdb; /* deep indigo */
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --border-color: #dee2e6;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
}

[data-theme="dark"] {
    --bg-primary: #1e1e1e;
    --bg-secondary: #252526;
    --bg-tertiary: #2d2d30;
    --text-primary: #e4e4e4;
    --text-secondary: #a0a0a0;
    --border-color: #3e3e42;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background 0.3s, color 0.3s;
}

.container {
    max-width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    background: linear-gradient(135deg, rgba(111,78,243,0.95), rgba(75,59,219,0.95));
    color: white;
    padding: 1.5rem 2rem;
    box-shadow: var(--shadow-md);
    position: relative;
}

header h1 {
    font-size: 1.8rem;
    margin-bottom: 0.3rem;
}

/* subtle floating animation for header title */
header h1 { 
    display:inline-block;
    transform-origin: center;
}
@keyframes floatTitle {
    0% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
    100% { transform: translateY(0); }
}
header h1 { animation: floatTitle 6s ease-in-out infinite; }

header p {
    font-size: 0.95rem;
    opacity: 0.9;
}

.theme-toggle {
    position: absolute;
    top: 1.5rem;
    right: 2rem;
}

#themeToggle {
    background: rgba(255,255,255,0.2);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s;
}

#themeToggle:hover {
    background: rgba(255,255,255,0.3);
    transform: scale(1.1);
}

/* Main Content */
.main-content {
    display: grid;
    grid-template-columns: 45% 55%;
    gap: 0;
    height: calc(100vh - 120px);
    overflow: hidden;
}

/* smooth entrance for panels */
.config-panel, .preview-panel { animation: fadeIn 0.45s ease both; }

/* Config Panel */
.config-panel {
    background: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
}

.panel-scroll {
    padding: 2rem;
}

.config-section {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 0;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

/* modern card hover lift */
.api-item, .scenario-item, .stage-item { transition: transform 0.18s ease, box-shadow 0.18s ease; }
.api-item:hover, .scenario-item:hover, .stage-item:hover { transform: translateY(-6px); box-shadow: 0 10px 30px rgba(75,59,219,0.12); }

/* Collapsible Section Headers */
.section-header {
    font-size: 1.1rem;
    margin: 0;
    padding: 1rem 1.5rem;
    color: var(--primary-color);
    background: var(--bg-tertiary);
    cursor: pointer;
    user-select: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background 0.2s;
}

.section-header:hover {
    background: var(--border-color);
}

.toggle-icon {
    font-size: 0.9rem;
    transition: transform 0.3s;
}

/* rotate toggle icon when collapsed/expanded */
.section-header[aria-expanded="true"] .toggle-icon { transform: rotate(0deg); }
.section-header[aria-expanded="false"] .toggle-icon { transform: rotate(-90deg); }

.section-content {
    padding: 1.5rem;
}

/* Form Elements */
.form-group {
    margin-bottom: 1rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.9rem;
}

input[type="text"],
input[type="number"],
input[type="password"],
select,
textarea {
    width: 100%;
    padding: 0.6rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: border 0.3s;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(125, 89, 198, 0.1);
}

textarea {
    resize: vertical;
    min-height: 80px;
    font-family: 'Courier New', monospace;
}

input[type="checkbox"] {
    margin-right: 0.5rem;
    cursor: pointer;
}

small {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: block;
    margin-top: 0.3rem;
}

/* Buttons */
.btn {
    padding: 0.7rem 1.5rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    color: white;
    width: 100%;
    box-shadow: 0 6px 18px rgba(111,78,243,0.18);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.01);
    box-shadow: 0 12px 30px rgba(75,59,219,0.14);
}

.btn-success {
    background: var(--success-color);
    color: white;
    width: 100%;
}

.btn-success:hover {
    background: #218838;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-danger {
    background: var(--danger-color);
    color: white;
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

.btn-danger:hover {
    background: #c82333;
}

.btn-icon {
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

.btn-icon:hover {
    background: var(--secondary-color);
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

/* Profile Selector - NEW */
.profile-selector {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.profile-btn {
    flex: 1;
    padding: 0.6rem;
    border: 2px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-primary);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s;
}

.profile-btn:hover {
    border-color: var(--primary-color);
}

.profile-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* small micro-interaction for profile buttons */
.profile-btn { transition: transform 0.12s ease, box-shadow 0.12s; }
.profile-btn:active { transform: translateY(1px) scale(0.995); }

/* Environment Variables - NEW */
.env-vars-list {
    margin-top: 0.5rem;
}

.env-var-item {
    margin-bottom: 0.5rem;
}

.env-var-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

/* Scenarios - NEW */
.scenarios-list {
    margin-top: 0.5rem;
}

.scenario-item {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem;
    margin-top: 0.5rem;
    background: var(--bg-primary);
}

.scenario-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.8rem;
}

/* Stages */
.stages-list {
    margin-top: 0.5rem;
}

.stage-item {
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.8rem;
    margin-bottom: 0.5rem;
    background: var(--bg-primary);
    transition: all 0.3s;
}

.stage-item:hover {
    box-shadow: var(--shadow-sm);
}

.stage-item input {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.stage-item label {
    font-size: 0.85rem;
    display: block;
    margin-bottom: 0.3rem;
}

/* API Items */
.api-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1.5rem;
    margin-top: 1rem;
}

/* subtle entry animation for new API items */
.api-item { animation: slideDown 0.28s ease-out; }

.api-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.api-item-title {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 1.1rem;
}

.api-item h4 {
    font-size: 0.95rem;
    margin: 1rem 0 0.5rem 0;
    color: var(--text-primary);
}

/* Request Chaining Section - NEW */
.chaining-section {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 4px;
    border-left: 3px solid var(--primary-color);
}

.extraction-config {
    margin-top: 0.5rem;
    padding-left: 1.5rem;
}

.extraction-config.hidden {
    display: none;
}

/* Think Time Section - NEW */
.api-thinktime-section {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 4px;
}

/* Auth Section */
.auth-section {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 4px;
}

.header-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    align-items: center;
}

.header-inputs {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 0.5rem;
}

/* Checks Section */
.checks-section {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 4px;
}

.check-item {
    display: grid;
    grid-template-columns: 2fr 2fr auto;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    align-items: center;
}

/* Action Buttons */
.action-buttons {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.8rem;
    margin-top: 2rem;
}

/* Preview Panel */
.preview-panel {
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
}

.preview-header { position: relative; }
.preview-panel { border-left: 1px solid rgba(111,78,243,0.06); }
.code-editor { background: linear-gradient(180deg, #0f1724 0%, #071126 100%); }

/* preview actions animation */
.preview-actions .btn-icon { transition: transform 0.16s ease, box-shadow 0.16s; }
.preview-actions .btn-icon:hover { transform: translateY(-3px); box-shadow: 0 8px 20px rgba(75,59,219,0.12); }

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.preview-header h2 {
    font-size: 1.2rem;
    color: var(--primary-color);
}

.preview-actions {
    display: flex;
    gap: 0.5rem;
}

.code-editor {
    flex: 1;
    overflow: hidden;
}

.preview-footer {
    padding: 1rem 2rem;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-text code {
    background: var(--bg-tertiary);
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    color: var(--primary-color);
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
}

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

.ramping-config.hidden,
.stages-config.hidden {
    display: none;
}

/* Responsive */
@media (max-width: 1200px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .preview-panel {
        height: 50vh;
    }

    .profile-selector {
        flex-direction: column;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

@keyframes slideDown {
    from { opacity: 0; max-height: 0; transform: translateY(-10px); }
    to { opacity: 1; max-height: 2000px; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

.scenario-item { transition: all 0.3s ease; }
.scenario-item:hover { box-shadow: var(--shadow-md); border-color: var(--primary-color); }
.scenario-preview, .validation-error { animation: fadeIn 0.3s ease-out; }
#scenariosConfig { transition: all 0.3s ease-out; }
#scenariosConfig.hidden { max-height: 0; overflow: hidden; padding: 0; margin: 0; }

/* Modal for cURL import */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}
.modal.hidden { display: none; }
.modal-content {
    background: var(--bg-primary);
    padding: 1rem;
    border-radius: 8px;
    width: 560px;
    box-shadow: var(--shadow-lg);
}

/* modal animate */
.modal-content { transform: translateY(-8px); opacity: 0; animation: fadeIn 0.18s ease forwards 0.05s; }

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
    header h1 { animation: none; }
    .api-item, .scenario-item, .stage-item, .preview-panel, .config-panel { animation: none; transform: none !important; }
    .modal-content { animation: none; }
}