@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* Modern UI Refresh for API Tester */
:root {
    --primary-color: #1f3c88;
    --secondary-color: #162a6a;
    --accent-color: #f97316;
    --success-color: #16a34a;
    --warning-color: #f59e0b;
    --danger-color: #dc2626;
    --info-color: #2563eb;
    --light-bg: #eef1f8;
    --dark-bg: #0b1120;
    --surface-card: #ffffff;
    --surface-muted: #f4f6fc;
    --border-color: #d9e2f1;
    --card-shadow: 0 24px 48px rgba(15, 23, 42, 0.12);
    --text-primary: #14213d;
    --text-secondary: #5b6d8f;
    --focus-ring: 0 0 0 3px rgba(31, 60, 136, 0.25);
}
body {
    background-color: var(--light-bg);
    color: var(--text-primary);
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    transition: background-color 0.35s ease, color 0.3s ease;
}
body.dark-theme {
    --light-bg: #0b1120;
    --surface-card: #111a2e;
    --surface-muted: #0f172a;
    --border-color: rgba(148, 163, 184, 0.22);
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --card-shadow: 0 26px 52px rgba(2, 6, 23, 0.6);
    background-color: var(--light-bg);
    color: var(--text-primary);
}
.container {
    max-width: 1280px;
    padding: clamp(24px, 4vw, 48px);
    margin: 0 auto;
}
button {
    font-family: inherit;
    font-weight: 500;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}
button:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}
button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}
header {
    background-color: var(--primary-color);
    color: #ffffff;
    border-radius: 26px;
    padding: clamp(28px, 3.5vw, 40px);
    margin-bottom: 32px;
    box-shadow: 0 30px 60px rgba(31, 60, 136, 0.2);
}
body.dark-theme header {
    background-color: var(--secondary-color);
    box-shadow: 0 24px 48px rgba(2, 6, 23, 0.6);
}
.header-grid {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 32px;
}
.header-brand {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 460px;
}
header h1 {
    margin: 0;
    font-size: clamp(2.2rem, 3.2vw, 2.9rem);
    font-weight: 700;
}
header p {
    margin: 0;
    font-size: 1.05rem;
    opacity: 0.9;
}
.header-actions {
    display: flex;
    flex-direction: column;
    gap: 18px;
    align-items: flex-end;
    min-width: 260px;
    flex: 1;
}
.workspace-controls {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 12px;
    margin-right: 0;
}
.workspace-select {
    min-width: 220px;
    padding: 10px 14px;
    border-radius: 14px;
    border: none;
    background-color: #ffffff;
    color: var(--primary-color);
    font-weight: 600;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.35);
}
body.dark-theme .workspace-select {
    background-color: var(--surface-card);
    color: var(--text-primary);
    box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.35);
}
.workspace-btn {
    padding: 10px 18px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.36);
    background-color: rgba(255, 255, 255, 0.16);
    color: #ffffff;
    font-weight: 600;
}
.workspace-btn:hover {
    background-color: rgba(255, 255, 255, 0.26);
}
body.dark-theme .workspace-btn {
    border-color: rgba(148, 163, 184, 0.32);
    background-color: rgba(148, 163, 184, 0.16);
    color: var(--text-primary);
}
body.dark-theme .workspace-btn:hover {
    background-color: rgba(148, 163, 184, 0.24);
}
.quick-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 12px;
}
.quick-actions button {
    padding: 10px 14px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.28);
    background-color: rgba(255, 255, 255, 0.14);
    color: #ffffff;
}
.quick-actions button:hover {
    background-color: rgba(255, 255, 255, 0.24);
}
body.dark-theme .quick-actions button {
    border-color: rgba(148, 163, 184, 0.3);
    background-color: rgba(148, 163, 184, 0.18);
    color: var(--text-primary);
}
body.dark-theme .quick-actions button:hover {
    background-color: rgba(148, 163, 184, 0.26);
}
.primary-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 24px;
    align-items: start;
    margin-bottom: 32px;
}
.secondary-layout {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
    align-items: start;
}
section {
    background-color: var(--surface-card);
    border: 1px solid var(--border-color);
    border-radius: 22px;
    padding: clamp(24px, 2.2vw, 32px);
    box-shadow: var(--card-shadow);
}
body.dark-theme section {
    box-shadow: 0 24px 48px rgba(2, 6, 23, 0.55);
}
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}
.section-header h2 {
    margin: 0;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
}
.method-url-row {
    display: grid;
    grid-template-columns: 140px minmax(0, 1fr) 160px;
    gap: 16px;
    padding: 16px;
    border-radius: 18px;
    border: 1px solid var(--border-color);
    background-color: var(--surface-muted);
    align-items: center;
}
input:not([type='checkbox']):not([type='radio']),
select,
textarea {
    background-color: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 10px 14px;
    font-size: 0.95rem;
    color: var(--text-primary);
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}
body.dark-theme input:not([type='checkbox']):not([type='radio']),
body.dark-theme select,
body.dark-theme textarea {
    background-color: var(--surface-card);
    border-color: rgba(148, 163, 184, 0.3);
    color: var(--text-primary);
}
input:not([type='checkbox']):not([type='radio']):focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--focus-ring);
}
.method-select {
    font-weight: 600;
    text-transform: uppercase;
}
.url-input {
    font-family: 'JetBrains Mono', 'Consolas', 'Courier New', monospace;
    font-size: 0.92rem;
}
.send-btn {
    background-color: var(--accent-color);
    color: #ffffff;
    padding: 12px 20px;
    border-radius: 12px;
    font-weight: 600;
    box-shadow: 0 18px 36px rgba(249, 115, 22, 0.25);
}
.send-btn:hover {
    background-color: #ea580c;
    transform: translateY(-1px);
}
.tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 18px;
    background-color: var(--surface-muted);
}
.tab-btn {
    padding: 10px 16px;
    border-radius: 12px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-secondary);
    font-weight: 600;
}
.tab-btn:hover {
    color: var(--text-primary);
    background-color: rgba(31, 60, 136, 0.08);
}
.tab-btn.active {
    background-color: var(--primary-color);
    color: #ffffff;
    box-shadow: 0 14px 32px rgba(31, 60, 136, 0.22);
}
.key-value-container {
    background-color: var(--surface-muted);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 18px;
}
.key-value-row {
    display: grid;
    grid-template-columns: 24px 1fr 1fr 44px;
    gap: 12px;
    align-items: center;
    margin-bottom: 12px;
}
.key-value-row.header {
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.key-value-row input[type='text'] {
    font-size: 0.9rem;
}
.add-btn {
    background-color: var(--success-color);
    color: #ffffff;
    border-radius: 12px;
    padding: 10px 16px;
}
.add-btn:hover {
    background-color: #15803d;
}
.remove-btn {
    background-color: rgba(220, 38, 38, 0.12);
    color: var(--danger-color);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    font-size: 1rem;
}
.remove-btn:hover {
    background-color: rgba(220, 38, 38, 0.2);
}
#requestBody {
    min-height: 220px;
    border-radius: 16px;
    font-family: 'JetBrains Mono', 'Consolas', 'Courier New', monospace;
}
.response-section .response-actions button {
    border-radius: 12px;
    padding: 10px 16px;
    font-weight: 600;
}
.response-content {
    background-color: var(--surface-muted);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    min-height: 280px;
    padding: 20px;
    overflow: auto;
}
.validation-results {
    background-color: rgba(37, 99, 235, 0.08);
    border: 1px solid rgba(37, 99, 235, 0.2);
    border-radius: 16px;
    padding: 20px;
}
body.dark-theme .validation-results {
    background-color: rgba(37, 99, 235, 0.18);
    border-color: rgba(37, 99, 235, 0.28);
}
.history-list,
.saved-list {
    max-height: 360px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.history-item,
.saved-item {
    display: grid;
    grid-template-columns: 90px 1fr 140px 100px;
    gap: 16px;
    align-items: center;
    padding: 16px;
    border-radius: 18px;
    border: 1px solid var(--border-color);
    background-color: var(--surface-muted);
}
.history-url,
.saved-url {
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
}
.history-time,
.saved-time {
    color: var(--text-secondary);
    font-size: 0.85rem;
}
.load-request-btn,
.load-saved-btn {
    background-color: var(--primary-color);
    color: #ffffff;
}
.load-request-btn:hover,
.load-saved-btn:hover {
    background-color: var(--secondary-color);
}
.delete-saved-btn {
    background-color: rgba(220, 38, 38, 0.15);
    color: var(--danger-color);
}
.delete-saved-btn:hover {
    background-color: rgba(220, 38, 38, 0.25);
}
.shortcuts-assist {
    position: fixed;
    bottom: 32px;
    right: 32px;
    z-index: 1100;
}
.shortcuts-trigger {
    display: flex;
    align-items: center;
    gap: 10px;
    background-color: var(--primary-color);
    color: #ffffff;
    padding: 12px 18px;
    border-radius: 26px;
    box-shadow: 0 18px 36px rgba(31, 60, 136, 0.25);
}
.shortcuts-trigger:hover {
    transform: translateY(-2px);
    box-shadow: 0 22px 40px rgba(31, 60, 136, 0.28);
}
.shortcuts-dropdown {
    background-color: var(--surface-card);
    border-radius: 18px;
    border: 1px solid var(--border-color);
    box-shadow: var(--card-shadow);
}
.shortcuts-header {
    background-color: var(--primary-color);
    color: #ffffff;
    padding: 16px 20px;
    border-radius: 18px 18px 0 0;
}
.shortcuts-footer {
    padding: 16px 20px;
    background-color: var(--surface-muted);
    border-radius: 0 0 18px 18px;
}
.help-btn {
    background-color: var(--primary-color);
    color: #ffffff;
    border-radius: 12px;
    font-weight: 600;
}
.help-btn:hover {
    background-color: var(--secondary-color);
}
.modal {
    background: rgba(15, 23, 42, 0.58);
}
body.dark-theme .modal {
    background: rgba(2, 6, 23, 0.72);
}
.modal-content {
    background-color: var(--surface-card);
    border-radius: 22px;
    border: 1px solid var(--border-color);
    box-shadow: var(--card-shadow);
}
.modal-header,
.modal-footer {
    border-color: var(--border-color);
}
body.dark-theme .response-content,
body.dark-theme .key-value-container,
body.dark-theme .history-item,
body.dark-theme .saved-item {
    background-color: rgba(17, 24, 39, 0.85);
}
body.dark-theme .shortcuts-trigger,
body.dark-theme .help-btn {
    background-color: var(--primary-color);
    color: #ffffff;
}
body.dark-theme .shortcuts-dropdown {
    background-color: var(--surface-card);
}
@media (max-width: 1200px) {
    .primary-layout {
        grid-template-columns: minmax(0, 1fr);
    }
}
@media (max-width: 992px) {
    .secondary-layout {
        grid-template-columns: minmax(0, 1fr);
    }
    .history-item,
    .saved-item {
        grid-template-columns: 90px minmax(0, 1fr);
        grid-template-rows: auto auto;
    }
    .history-item > :nth-child(3),
    .history-item > :nth-child(4),
    .saved-item > :nth-child(3),
    .saved-item > :nth-child(4) {
        grid-column: span 2;
    }
}
@media (max-width: 768px) {
    header {
        padding: 28px;
    }
    .header-actions {
        align-items: stretch;
        min-width: auto;
    }
    .workspace-controls {
        justify-content: flex-start;
    }
    .method-url-row {
        grid-template-columns: minmax(0, 1fr);
    }
    .primary-layout,
    .secondary-layout {
        gap: 20px;
    }
    .shortcuts-assist {
        bottom: 20px;
        right: 20px;
    }
}