/* Core Design Tokens & Visual Guidelines (New 2026 Edition - Dusk Blue Theme) */
:root {
    /* Color Swatches */
    --color-primary-accent: #3d5a80;
    --color-secondary-accent: #98c1d9;
    --color-success: #8acb88;
    --color-destructive: #ee6c4d;
    --color-highlight: #ede7b1;
    --color-bg-base: #f5f5f7;
    --color-bg-surface: #ffffff;
    --color-text-primary: #1a1a1a;
    --color-text-muted: #666666;
    --color-border: #e5e7eb;
    --color-border-hover: #cbd5e1;
    --color-overlay-bg: rgba(26, 26, 26, 0.5);
    --color-neutral-shaded: rgba(26, 26, 26, 0.05);

    /* Geometry & Spacing */
    --border-radius-sm: 4px;
    --grid-gap-base: 20px;
    --interactive-height: 44px;

    /* Typography Stacks */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace;
}

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

html, body {
    height: 100%;
    font-family: var(--font-sans);
    background-color: var(--color-bg-base);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.itools-body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.itools-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--grid-gap-base);
}

/* Typography Utilities */
.text-sans { font-family: var(--font-sans); }
.text-mono { font-family: var(--font-mono); }

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.25;
    color: var(--color-text-primary);
}

/* Navbar System (Single Unified Header) */
.itools-navbar {
    height: 60px !important;
    min-height: 60px !important;
    background-color: var(--color-bg-surface);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--grid-gap-base);
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
    position: sticky;
    top: 0;
    z-index: 100;
    box-sizing: border-box;
}

.navbar-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.module-navbar-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.module-navbar-actions .btn,
.module-navbar-actions .dropdown-toggle {
    height: 34px !important;
    line-height: 32px !important;
    padding: 0 12px !important;
    font-size: 0.82rem !important;
    display: inline-flex !important;
    align-items: center !important;
    gap: 6px !important;
    box-sizing: border-box !important;
}

.module-navbar-actions .btn-icon-reset {
    width: 34px !important;
    height: 34px !important;
    background-color: #ffffff !important;
    border: 1px solid var(--color-border) !important;
    border-radius: var(--border-radius-sm) !important;
    color: var(--color-text-main) !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    cursor: pointer;
    transition: all 0.15s ease;
    padding: 0 !important;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    box-sizing: border-box !important;
}

.module-navbar-actions .btn-icon-reset:hover {
    background-color: var(--color-neutral-shaded) !important;
    color: var(--color-primary-accent) !important;
    border-color: var(--color-primary-accent) !important;
}


.brand-link {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--color-primary-accent);
}

.brand-icon {
    stroke: var(--color-primary-accent);
}

.brand-title-link, .module-title-link {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--color-primary-accent);
}

.module-name {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-primary-accent);
    letter-spacing: -0.3px;
}

.brand-tag {
    font-size: 0.75rem;
    font-weight: 600;
    background-color: var(--color-neutral-shaded);
    color: var(--color-text-muted);
    padding: 2px 6px;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-mono);
}

.btn-module-selector {
    width: 32px;
    height: 32px;
    border-radius: var(--border-radius-sm);
    background-color: var(--color-neutral-shaded);
    border: 1px solid var(--color-border);
    color: var(--color-primary-accent);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}


.btn-module-selector:hover {
    background-color: var(--color-primary-accent);
    color: #ffffff;
}

.dropdown-header {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-muted);
    padding: 6px 14px 4px 14px;
}

.dropdown-divider {
    height: 1px;
    background-color: var(--color-border);
    margin: 4px 0;
}

.dropdown-item.active-item {
    font-weight: 700;
    color: var(--color-primary-accent);
    background-color: rgba(61, 90, 128, 0.08);
}


/* Dashboard Hero */
.dashboard-hero {
    display: flex;
    flex-direction: column;
    gap: 32px;
    padding: 32px 0;
}

.hero-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: 4px 12px;
    background-color: var(--color-secondary-accent);
    color: var(--color-primary-accent);
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: var(--border-radius-sm);
    margin-bottom: 12px;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-primary-accent);
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-muted);
}

.module-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--grid-gap-base);
}

.module-card {
    background-color: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    padding: 24px;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.module-card:hover {
    border-color: var(--color-primary-accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(61, 90, 128, 0.08);
}

.module-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.module-card-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    background-color: var(--color-neutral-shaded);
    color: var(--color-primary-accent);
    padding: 4px 8px;
    border-radius: var(--border-radius-sm);
}

.module-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-sm);
    background-color: rgba(61, 90, 128, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary-accent);
}

.module-card-title {
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: var(--color-text-primary);
}

.module-card-desc {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 24px;
}

.module-card-footer {
    display: flex;
    justify-content: flex-end;
}

.btn-launch {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-primary-accent);
    transition: color 0.15s ease;
}

.module-card:hover .btn-launch {
    color: var(--color-primary-accent);
    text-decoration: underline;
}

/* Full-Width Module Sub-Header Bar */
.module-subnav {
    width: 100%;
    background-color: var(--color-bg-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
    position: sticky;
    top: 60px;
    z-index: 90;
}


.subnav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 12px var(--grid-gap-base);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

/* Dropdown Menu System */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 220px;
    background-color: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    display: none;
    flex-direction: column;
    padding: 6px 0;
    z-index: 500;
    animation: dropdownFadeIn 0.15s ease-out;
}

.dropdown-menu.show {
    display: flex;
}

@keyframes dropdownFadeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    font-family: var(--font-sans);
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--color-text-primary);
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease;
    text-decoration: none;
}

.dropdown-item:hover {
    background-color: var(--color-neutral-shaded);
    color: var(--color-primary-accent);
}

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

.dropdown-item:hover svg {
    color: var(--color-primary-accent);
}

/* Icon Buttons (Square with rounded borders, white background) */
.btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    border-radius: var(--border-radius-sm);
    background-color: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    transition: all 0.15s ease;
    flex-shrink: 0;
}

.btn-icon:hover {
    border-color: var(--color-primary-accent);
    color: var(--color-primary-accent);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
}

.btn-icon-danger:hover {
    border-color: var(--color-destructive);
    background-color: hsla(0, 85%, 97%, 0.8);
    color: var(--color-destructive);
}


/* Module Main Container Adjustment */
.module-main {
    padding-top: 16px;
}


.badge {
    display: inline-block;
    padding: 2px 8px;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    background-color: var(--color-secondary-accent);
    color: var(--color-primary-accent);
}

.tool-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

/* UI Controls: Buttons & Inputs */
.btn {
    height: var(--interactive-height);
    padding: 0 16px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.15s ease;
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: #2c4463;
}

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

.btn-secondary:hover {
    background-color: #7fb2cf;
}

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

.btn-muted:hover:not(:disabled) {
    border-color: var(--color-border-hover);
    background-color: #eaeaea;
}

.btn-destructive {
    background-color: var(--color-destructive);
    color: #ffffff;
}

.btn-destructive:hover {
    background-color: #d85739;
}

.btn-success {
    background-color: var(--color-success);
    color: #ffffff;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form-control {
    height: var(--interactive-height);
    padding: 0 12px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    background-color: var(--color-bg-surface);
    color: var(--color-text-primary);
    outline: none;
    transition: border-color 0.15s ease;
}

.form-control:hover {
    border-color: var(--color-border-hover);
}

.form-control:focus {
    border-color: var(--color-primary-accent);
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-overlay-bg);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-dialog {
    background-color: var(--color-bg-surface);
    border-radius: var(--border-radius-sm);
    width: 90%;
    max-width: 540px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    max-height: 90vh;
    overflow: hidden;
}

.modal-header {
    padding: 16px var(--grid-gap-base);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 1.15rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text-muted);
    cursor: pointer;
    line-height: 1;
}

.modal-close:hover {
    color: var(--color-text-primary);
}

.modal-body {
    padding: var(--grid-gap-base);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.modal-footer {
    padding: 16px var(--grid-gap-base);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    background-color: var(--color-bg-base);
}

/* Toast Notifications (Bottom Right Corner) */
#toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 2000;
    display: flex;
    flex-direction: column-reverse;
    gap: 10px;
    pointer-events: none;
}

.toast {
    pointer-events: auto;
    min-width: 280px;
    max-width: 400px;
    padding: 14px 18px;
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.12);
    transform: translateX(120%);
    animation: toastSlideIn 0.3s forwards ease-out;
}

.toast.toast-success {
    background-color: hsla(142, 70%, 95%, 0.98);
    color: #1b4d24;
    border: 1px solid #8acb88;
}

.toast.toast-error {
    background-color: hsla(0, 85%, 97%, 0.98);
    color: #8c1d07;
    border: 1px solid #ee6c4d;
}

@keyframes toastSlideIn {
    to { transform: translateX(0); }
}

@keyframes toastFadeOut {
    to { opacity: 0; transform: translateY(10px); }
}


/* Footer */
.itools-footer {
    background-color: var(--color-bg-surface);
    border-top: 1px solid var(--color-border);
    padding: 16px var(--grid-gap-base);
    margin-top: auto;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* Responsive Mobile Layout (<768px) */
@media (max-width: 768px) {
    .itools-navbar {
        padding: 0 12px;
    }
    .brand-name {
        font-size: 1.1rem;
    }
    .hero-title {
        font-size: 1.8rem;
    }
    .footer-content {
        flex-direction: column;
        gap: 6px;
        text-align: center;
    }
    .tool-header {
        flex-direction: column;
        align-items: flex-start;
    }
}