/* Custom Premium Styling for Coating Inspector Handbook App */

/* Core Variables and Themes */
:root {
    /* Fonts */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Transition */
    --transition-speed: 0.25s;
    --transition-curve: cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Layout */
    --sidebar-width: 280px;
    --border-radius: 12px;
}

[data-theme="dark"] {
    --bg-app: hsl(222, 25%, 10%);
    --bg-sidebar: hsl(222, 25%, 7%);
    --bg-card: hsl(222, 20%, 13%);
    --bg-input: hsl(222, 20%, 8%);
    --bg-highlight: hsl(222, 30%, 18%);
    
    --text-primary: hsl(210, 40%, 98%);
    --text-secondary: hsl(215, 20%, 65%);
    --text-muted: hsl(215, 15%, 45%);
    
    --border-color: hsl(222, 15%, 18%);
    --border-focus: hsl(217, 90%, 60%);
    
    --color-primary: hsl(217, 90%, 60%);
    --color-primary-glow: hsla(217, 90%, 60%, 0.15);
    --color-green: hsl(142, 70%, 45%);
    --color-green-glow: hsla(142, 70%, 45%, 0.15);
    --color-red: hsl(350, 80%, 55%);
    --color-red-glow: hsla(350, 80%, 55%, 0.15);
    --color-amber: hsl(38, 90%, 55%);
    --color-amber-glow: hsla(38, 90%, 55%, 0.15);

    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.4);
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.05);

    /* Sidebar Variables (Dark Theme Default) */
    --sidebar-bg: linear-gradient(180deg, #090d16 0%, #111827 100%);
    --sidebar-border: #1f2937;
    --sidebar-logo-text: #ffffff;
    --sidebar-menu-label: #38bdf8; /* Vibrant cyan-blue */
    --sidebar-text: #9ca3af;
    --sidebar-text-hover: #ffffff;
    --sidebar-bg-hover: rgba(255, 255, 255, 0.08);
    --sidebar-active-bg: var(--color-primary);
    --sidebar-active-text: #ffffff;
    --sidebar-active-border: #60a5fa;
    --sidebar-search-bg: #1f2937;
    --sidebar-search-border: #374151;
    --sidebar-search-text: #ffffff;
    --sidebar-search-focus-bg: #111827;
    --sidebar-search-focus-border: #3b82f6;
}

[data-theme="light"] {
    --bg-app: hsl(210, 20%, 96%);
    --bg-sidebar: hsl(214, 15%, 91%); /* Light sidebar in light theme */
    --bg-card: hsl(0, 0%, 100%);
    --bg-input: hsl(210, 20%, 94%);
    --bg-highlight: hsl(210, 20%, 90%);
    
    --text-primary: hsl(222, 25%, 12%);
    --text-secondary: hsl(220, 15%, 40%);
    --text-muted: hsl(220, 10%, 60%);
    
    --border-color: hsl(210, 15%, 85%);
    --border-focus: hsl(217, 90%, 50%);
    
    --color-primary: hsl(217, 90%, 50%);
    --color-primary-glow: hsla(217, 90%, 50%, 0.1);
    --color-green: hsl(142, 75%, 35%);
    --color-green-glow: hsla(142, 75%, 35%, 0.1);
    --color-red: hsl(350, 75%, 45%);
    --color-red-glow: hsla(350, 75%, 45%, 0.1);
    --color-amber: hsl(38, 85%, 45%);
    --color-amber-glow: hsla(38, 85%, 45%, 0.1);

    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(0, 0, 0, 0.05);

    /* Sidebar Variables (Light Theme - Vibrant light slate & royal blue) */
    --sidebar-bg: linear-gradient(180deg, #f8fafc 0%, #e2e8f0 100%);
    --sidebar-border: #cbd5e1;
    --sidebar-logo-text: #0f172a;
    --sidebar-menu-label: #2563eb; /* Vibrant royal blue */
    --sidebar-text: #475569; /* Slate gray */
    --sidebar-text-hover: #2563eb; /* Royal blue hover text */
    --sidebar-bg-hover: rgba(37, 99, 235, 0.06); /* Soft blue tint */
    --sidebar-active-bg: #2563eb; /* Vibrant royal blue background */
    --sidebar-active-text: #ffffff;
    --sidebar-active-border: #2563eb;
    --sidebar-search-bg: #ffffff;
    --sidebar-search-border: #cbd5e1;
    --sidebar-search-text: #0f172a;
    --sidebar-search-focus-bg: #ffffff;
    --sidebar-search-focus-border: #2563eb;
}

/* Reset and Globals */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-app);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 15px;
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-speed) var(--transition-curve);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 0.5em;
    color: var(--text-primary);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-speed);
}
a:hover {
    color: var(--border-focus);
}

/* Layout Container */
.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Sidebar Navigation */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    overflow-y: auto;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    border-right: 1px solid var(--sidebar-border);
    z-index: 10;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
    padding: 0 0.5rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-primary), hsl(200, 90%, 50%));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}
.logo-icon svg {
    width: 24px;
    height: 24px;
}

.logo-text h1 {
    font-size: 1.25rem;
    line-height: 1.2;
    margin-bottom: 0;
    color: var(--sidebar-logo-text);
}
.logo-text span {
    font-size: 0.75rem;
    color: var(--sidebar-text);
    opacity: 0.8;
    font-weight: 500;
}

/* Sidebar Search Box */
.search-box {
    position: relative;
    margin-bottom: 1.5rem;
    padding: 0 0.25rem;
}
.search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--sidebar-text);
    opacity: 0.7;
}
#handbook-search {
    width: 100%;
    background-color: var(--sidebar-search-bg);
    border: 1px solid var(--sidebar-search-border);
    border-radius: 8px;
    padding: 0.5rem 2.25rem 0.5rem 2.25rem;
    color: var(--sidebar-search-text);
    font-family: var(--font-body);
    font-size: 0.9rem;
    outline: none;
    transition: all var(--transition-speed);
}
#handbook-search:focus {
    border-color: var(--sidebar-search-focus-border);
    background-color: var(--sidebar-search-focus-bg);
    box-shadow: 0 0 0 2px var(--color-primary-glow);
}
.search-clear-btn {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--sidebar-text);
    opacity: 0.6;
    border-radius: 50%;
    transition: all var(--transition-speed);
}
.search-clear-btn:hover {
    opacity: 1;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-red, #ef4444);
}
.search-clear-btn svg {
    width: 14px;
    height: 14px;
}

/* Nav Menu */
.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    flex-grow: 1;
}

.menu-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--sidebar-menu-label);
    letter-spacing: 0.08em;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    padding: 0 0.5rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0.75rem;
    border-radius: 6px;
    color: var(--sidebar-text);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-speed);
}
.nav-item:hover {
    background-color: var(--sidebar-bg-hover);
    color: var(--sidebar-text-hover);
}
.nav-item.active {
    background: var(--sidebar-active-bg);
    color: var(--sidebar-active-text);
    font-weight: 600;
}

/* Special Highlight Item */
.nav-item.highlight-calc {
    border: 1px dashed var(--sidebar-active-border);
    background-color: var(--sidebar-bg-hover);
    color: var(--sidebar-text-hover);
}
.nav-item.highlight-calc:hover {
    background: var(--sidebar-active-bg);
    color: var(--sidebar-active-text);
}

.nav-icon {
    width: 18px;
    height: 18px;
}

/* Sidebar Footer */
.sidebar-footer {
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.theme-toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.85rem;
    transition: all var(--transition-speed);
}
.theme-toggle-btn:hover {
    background-color: var(--bg-highlight);
    color: var(--text-primary);
}
.theme-toggle-btn svg {
    width: 16px;
    height: 16px;
}

.footer-info {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-align: center;
}

/* Main Content Layout */
.main-content {
    flex-grow: 1;
    padding: 2.5rem;
    overflow-y: auto;
    height: 100vh;
}

/* Page Header */
.page-header {
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}
.page-header h2 {
    font-size: 2rem;
    margin-bottom: 0.25rem;
}
.page-header p {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* Grids and Containers */
.grid {
    display: grid;
    gap: 1.5rem;
}
.grid-1 { grid-template-columns: 1fr; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

.mt-4 { margin-top: 1.5rem; }
.mt-2 { margin-top: 0.75rem; }
.mb-3 { margin-bottom: 1rem; }

.divider {
    height: 1px;
    background-color: var(--border-color);
    margin: 1.5rem 0;
}

/* Cards Design System */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-speed) var(--transition-curve), 
                box-shadow var(--transition-speed) var(--transition-curve);
}

.interactive-card {
    cursor: pointer;
    position: relative;
    overflow: hidden;
}
.interactive-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-family: var(--font-heading);
    margin-bottom: 1.25rem;
    font-size: 1.1rem;
}
.color-blue { background-color: var(--color-primary-glow); color: var(--color-primary); }
.color-green { background-color: var(--color-green-glow); color: var(--color-green); }
.color-amber { background-color: var(--color-amber-glow); color: var(--color-amber); }

.interactive-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}
.card-arrow {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-primary);
}

/* Border Left Accents */
.border-left-accent {
    border-left: 4px solid var(--color-primary);
}

/* Welcome Banner */
.welcome-banner {
    position: relative;
    background: linear-gradient(135deg, hsl(222, 35%, 15%), var(--color-primary));
    border-radius: var(--border-radius);
    padding: 2.5rem;
    color: white;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}
.banner-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top right, rgba(255,255,255,0.1), transparent 60%);
}
.banner-content {
    position: relative;
    z-index: 2;
    max-width: 600px;
}
.banner-content h2 {
    color: white;
    font-size: 2.25rem;
    margin-bottom: 0.5rem;
    font-family: var(--font-heading);
    font-weight: 700;
}
.banner-content p {
    color: hsla(210, 40%, 98%, 0.85);
    font-size: 1.1rem;
}

/* Paragraphs and Lists styling */
.intro-paragraph {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.quick-links-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.quick-link-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    border-radius: 8px;
    border: 1px solid transparent;
    color: var(--text-primary);
}
.quick-link-item:hover {
    border-color: var(--border-color);
    background-color: var(--bg-highlight);
}
.quick-link-item span {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    background-color: var(--color-primary-glow);
    color: var(--color-primary);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-weight: 600;
}

/* Tabs System */
.tabs-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.tabs-header {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    gap: 1rem;
}

.tab-btn {
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    padding: 0.75rem 0.5rem;
    cursor: pointer;
    transition: all var(--transition-speed);
}
.tab-btn:hover {
    color: var(--text-primary);
}
.tab-btn.active {
    color: var(--color-primary);
    border-color: var(--color-primary);
    font-weight: 600;
}

.tab-pane {
    display: none;
}
.tab-pane.active {
    display: block;
    animation: fadeIn var(--transition-speed) var(--transition-curve);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Forms and Inputs */
.form-group {
    margin-bottom: 1.25rem;
}
.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}
.form-group input[type="number"],
.form-group input[type="text"],
.form-group select {
    width: 100%;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    outline: none;
    transition: all var(--transition-speed);
}
.form-group input[type="number"]:focus,
.form-group input[type="text"]:focus,
.form-group select:focus {
    border-color: var(--border-focus);
    background-color: var(--bg-card);
    box-shadow: 0 0 0 2px var(--color-primary-glow);
}

.form-group-checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
}
.form-group-checkbox input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--color-primary);
}
.form-group-checkbox label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
}

/* Range sliders */
.range-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.range-container input[type="range"] {
    flex-grow: 1;
    accent-color: var(--color-primary);
}
.range-container input[type="number"] {
    width: 80px;
    text-align: center;
}

/* Result Card specific styles */
.result-card {
    background: linear-gradient(135deg, var(--bg-card), var(--bg-highlight));
    border-color: var(--border-color);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

@media (min-width: 1025px) {
    .result-card {
        position: sticky;
        top: 1.5rem;
        align-self: start;
        max-height: calc(100vh - 8rem);
        overflow-y: auto;
    }
}

.result-display {
    text-align: center;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border-color);
}
.result-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}
.result-value {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1;
    color: var(--color-primary);
}
.result-unit {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-left: 0.25rem;
}

.result-details {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.detail-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    border-bottom: 1px dashed var(--border-color);
    padding-bottom: 0.5rem;
}
.detail-row span:first-child {
    color: var(--text-secondary);
}
.detail-row span:last-child {
    font-weight: 600;
    font-family: var(--font-mono);
}

.calc-info-box {
    margin-top: 1.5rem;
    background-color: var(--bg-input);
    border-radius: 8px;
    padding: 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.status-banner {
    width: 100%;
    padding: 0.75rem;
    border-radius: 8px;
    text-align: center;
    font-weight: 700;
    font-size: 1.1rem;
    margin-top: 1rem;
}
.status-banner.suitable {
    background-color: var(--color-green-glow);
    color: var(--color-green);
    border: 1px solid var(--color-green);
}
.status-banner.unsuitable {
    background-color: var(--color-red-glow);
    color: var(--color-red);
    border: 1px solid var(--color-red);
}

.dew-warning-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 1rem;
    line-height: 1.5;
}

/* Display grid inside result displays */
.display-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}
.display-grid > div:first-child {
    border-right: 1px solid var(--border-color);
}
.color-amber-val {
    color: var(--color-amber);
}

/* SVG Schematics for calculations */
.area-schematic-box {
    margin-top: 1.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--bg-input);
    border-radius: 8px;
    padding: 1rem;
    height: 180px;
}
.area-svg {
    width: 100%;
    height: 100%;
    max-width: 160px;
    color: var(--color-primary);
}

/* Handbook styling formatting */
.handbook-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}
.handbook-header {
    background-color: var(--bg-highlight);
    padding: 1rem 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}
.handbook-header h3 {
    margin-bottom: 0;
    font-size: 1.15rem;
    margin-right: auto;
}
.handbook-toggle-icon {
    font-size: 1.25rem;
    transition: transform var(--transition-speed);
}
.handbook-card.open .handbook-toggle-icon {
    transform: rotate(180deg);
}

.handbook-body {
    display: none;
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
}
.handbook-card.open .handbook-body {
    display: block;
}

/* Technical Content elements inside el kitabı */
.handbook-section h3 {
    font-size: 1.25rem;
    border-left: 3px solid var(--color-primary);
    padding-left: 0.75rem;
    margin-bottom: 1rem;
}
.handbook-section h4 {
    font-size: 1.05rem;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}
.handbook-section p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}
.handbook-section ul, .handbook-section ol {
    margin-left: 1.5rem;
    margin-bottom: 1.25rem;
    color: var(--text-secondary);
}
.handbook-section li {
    margin-bottom: 0.4rem;
}

.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.25rem;
}
.alert-note {
    background-color: var(--color-primary-glow);
    border: 1px solid var(--color-primary);
    color: var(--text-primary);
}
.alert-warning {
    background-color: var(--color-amber-glow);
    border: 1px solid var(--color-amber);
    color: var(--text-primary);
}
.alert-important {
    background-color: var(--color-red-glow);
    border: 1px solid var(--color-red);
    color: var(--text-primary);
}
.alert-caution {
    background-color: var(--color-red-glow);
    border: 1px solid var(--color-red);
    color: var(--text-primary);
}

/* Tables styling in handbook */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}
th, td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}
th {
    background-color: var(--bg-input);
    color: var(--text-primary);
    font-weight: 600;
}
tr:hover td {
    background-color: rgba(255, 255, 255, 0.02);
}

/* Search results list */
.search-match-card {
    border-left: 4px solid var(--color-primary);
    padding: 1rem;
    background-color: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    border-left-width: 4px;
    cursor: pointer;
    transition: all var(--transition-speed);
}
.search-match-card:hover {
    background-color: var(--bg-highlight);
}
.search-match-card h4 {
    margin-bottom: 0.25rem;
}
.search-match-card span {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Paint Consumption Tab Styles */
.coat-section-card {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.25rem 1rem 0.5rem 1rem;
    margin-bottom: 1rem;
}
.coat-title {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.25rem;
}
.color-green-val {
    color: var(--color-green);
}

/* Steel Measurement Tab Styles */
.profile-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    font-size: 0.8rem;
    color: var(--text-primary);
    transition: background-color var(--transition-speed);
}
.profile-item:last-child {
    border-bottom: none;
}
.profile-item:hover {
    background-color: var(--bg-highlight);
}
.profile-item.selected {
    background-color: rgba(59, 130, 246, 0.1);
    font-weight: 600;
    border-left: 4px solid var(--color-primary);
}
.profile-item .profile-badge {
    background-color: var(--border-color);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.7rem;
    color: var(--text-secondary);
}
.profile-item.selected .profile-badge {
    background-color: var(--color-primary);
    color: white;
}
.profile-factor-badge {
    font-weight: 600;
    color: var(--color-green);
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
    .app-container {
        flex-direction: column;
        height: auto;
        overflow: visible;
    }
    .sidebar {
        width: 100%;
        height: auto;
        overflow-y: visible;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    .main-content {
        height: auto;
        padding: 1.5rem;
    }
    .grid-3, .grid-2 {
        grid-template-columns: 1fr;
    }
}

/* Card and Calculator Print/PDF Actions */
.result-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.75rem;
}

.result-card-header h3 {
    margin-bottom: 0 !important;
}

.calc-actions {
    display: flex;
    gap: 0.35rem;
}

.btn-print-calc, .btn-pdf-calc {
    padding: 5px 9px;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    background-color: var(--bg-input);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    font-family: var(--font-body);
    font-weight: 500;
    transition: all var(--transition-speed) var(--transition-curve);
}

.btn-print-calc:hover {
    background-color: var(--color-primary-glow);
    color: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-1px);
}

.btn-pdf-calc:hover {
    background-color: var(--color-amber-glow);
    color: var(--color-amber);
    border-color: var(--color-amber);
    transform: translateY(-1px);
}

.handbook-actions {
    display: flex;
    gap: 0.35rem;
    align-items: center;
}

.btn-card-action {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 28px;
    height: 28px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-speed) var(--transition-curve);
}

.btn-card-action:hover {
    background: var(--color-primary-glow);
    color: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-1px);
}

.btn-card-action.btn-pdf-card:hover {
    background: var(--color-amber-glow);
    color: var(--color-amber);
    border-color: var(--color-amber);
}

.btn-card-action svg {
    display: block;
}

/* Send to Paint Consumption Calculator Button */
.btn-send-to-calc {
    margin-top: 0.5rem;
    font-size: 0.75rem;
    padding: 6px 12px;
    background-color: var(--color-primary-glow);
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-weight: 600;
    transition: all var(--transition-speed) var(--transition-curve);
}
.btn-send-to-calc:hover {
    background-color: var(--color-primary);
    color: white;
    transform: translateY(-1px);
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s var(--transition-curve);
}

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

.modal-content {
    width: 90%;
    max-width: 450px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    transform: scale(0.9);
    transition: transform 0.2s var(--transition-curve);
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.75rem;
    margin-bottom: 1rem;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.2rem;
    color: var(--text-primary);
}

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

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

.selected-profile-details {
    background-color: var(--bg-highlight);
    border: 1px dashed var(--color-primary);
    padding: 0.85rem;
    border-radius: 8px;
    margin-bottom: 1.25rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

.modal-footer .btn {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
    font-weight: 500;
}

/* Corrosion & Price Analysis Custom Styles */
.btn-select-cat, .btn-select-dur {
    transition: all var(--transition-speed) var(--transition-curve);
    cursor: pointer;
    color: var(--text-primary) !important;
    background-color: var(--bg-input) !important;
    border: 1px solid var(--border-color) !important;
}

.btn-select-cat:hover, .btn-select-dur:hover {
    background-color: var(--bg-highlight) !important;
    border-color: var(--border-focus) !important;
}

.btn-select-cat.active, .btn-select-dur.active {
    border-color: var(--border-focus) !important;
    background-color: var(--color-primary-glow) !important;
    color: var(--text-primary) !important;
    box-shadow: 0 0 0 2px var(--color-primary-glow);
}

#btn-toggle-price.active {
    background-color: var(--color-amber) !important;
    border-color: var(--color-amber) !important;
    color: white !important;
}

/* Premium Button Styling Resets */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-body);
    border-radius: 6px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-speed) var(--transition-curve);
    font-weight: 500;
}

.btn-primary {
    background-color: var(--color-primary) !important;
    color: white !important;
}
.btn-primary:hover {
    background-color: var(--border-focus) !important;
}
.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary {
    background-color: var(--bg-input) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-primary) !important;
}
.btn-secondary:hover {
    background-color: var(--bg-highlight) !important;
    border-color: var(--border-focus) !important;
}

/* Duration helper text in modal */
.btn-select-dur span.dur-years {
    font-size: 0.75rem;
    color: var(--text-secondary);
    float: right;
}

/* Sidebar Specific Footer & Toggle Button Styles */
.sidebar-footer {
    border-top: 1px solid var(--sidebar-border) !important;
}

.sidebar .theme-toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: var(--sidebar-search-bg) !important;
    border: 1px solid var(--sidebar-search-border) !important;
    color: var(--sidebar-text) !important;
    padding: 0.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.85rem;
    transition: all var(--transition-speed);
}
.sidebar .theme-toggle-btn:hover {
    background-color: var(--sidebar-bg-hover) !important;
    color: var(--sidebar-text-hover) !important;
}
.sidebar .theme-toggle-btn svg {
    width: 16px;
    height: 16px;
}

.sidebar .footer-info {
    font-size: 0.7rem;
    color: var(--sidebar-text) !important;
    opacity: 0.6;
    text-align: center;
}

/* Shared Category Badge Colors for Tables */
.badge-c2 { color: #38bdf8 !important; text-shadow: 0 0 12px rgba(56, 189, 248, 0.35); }
.badge-c3 { color: #34d399 !important; text-shadow: 0 0 12px rgba(52, 211, 153, 0.35); }
.badge-c4 { color: #fbbf24 !important; text-shadow: 0 0 12px rgba(251, 191, 36, 0.35); }
.badge-c5 { color: #f87171 !important; text-shadow: 0 0 12px rgba(248, 113, 113, 0.35); }
.badge-c2m { color: #c084fc !important; text-shadow: 0 0 12px rgba(192, 132, 252, 0.35); }
.badge-im1 { color: #2dd4bf !important; text-shadow: 0 0 12px rgba(45, 212, 191, 0.35); }
.badge-im2 { color: #60a5fa !important; text-shadow: 0 0 12px rgba(96, 165, 250, 0.35); }
.badge-im3 { color: #818cf8 !important; text-shadow: 0 0 12px rgba(129, 140, 248, 0.35); }

/* ISO 1461 Table Styles */
.iso1461-table {
    width: 100%;
    border-collapse: collapse !important;
    text-align: center;
    font-size: 0.85rem;
    margin-bottom: 1.25rem;
}
.iso1461-table th, .iso1461-table td {
    border: 1px solid var(--border-color) !important;
    text-align: center;
    vertical-align: middle;
    padding: 8px 6px;
}
.iso1461-table thead tr:first-child th {
    background-color: var(--bg-highlight);
    color: var(--color-primary);
    font-weight: 700;
    border-bottom: 2px solid var(--border-color) !important;
}
.iso1461-table thead tr:nth-child(2) th,
.iso1461-table thead tr:nth-child(3) th {
    background-color: var(--bg-input);
    color: var(--text-primary);
    font-size: 0.8rem;
    font-weight: 600;
}
.iso1461-table tbody tr.group-start td {
    border-top: 2px solid rgba(59, 130, 246, 0.45) !important;
}
.iso1461-table tbody tr.cat-even {
    background-color: rgba(255, 255, 255, 0.025);
}
.iso1461-table tbody tr.cat-odd {
    background-color: rgba(0, 0, 0, 0.12);
}
[data-theme="light"] .iso1461-table tbody tr.cat-even {
    background-color: #f8fafc;
}
[data-theme="light"] .iso1461-table tbody tr.cat-odd {
    background-color: #ffffff;
}
.iso1461-table td.cat-header {
    text-align: center;
    font-weight: 800;
    font-size: 0.92rem;
    background-color: var(--bg-input) !important;
    line-height: 1.3;
    padding: 8px 10px;
}
.iso1461-table td.cat-sub {
    font-weight: 700;
    color: var(--text-primary);
    background-color: var(--bg-input);
    font-size: 0.8rem;
}
.iso1461-table td.cell-a {
    background: rgba(59, 130, 246, 0.12);
    font-weight: 800;
    color: var(--color-primary);
    font-size: 1.15rem;
    letter-spacing: 1px;
}
.iso1461-table td.cell-dash {
    color: var(--text-muted);
    opacity: 0.35;
    font-weight: bold;
}
.iso1461-table td.val-num {
    font-weight: 700;
    color: var(--text-primary);
}

/* ISO 12944 Section 5 DFT Table */
.iso-dft-table {
    width: 100%;
    border-collapse: collapse !important;
    text-align: center;
    font-size: 0.78rem;
    margin-bottom: 1.5rem;
}
.iso-dft-table th, 
.iso-dft-table td {
    border: 1px solid var(--border-color) !important;
    text-align: center;
    vertical-align: middle;
    padding: 7px 5px;
}
.iso-dft-table thead tr:first-child th {
    background-color: var(--bg-highlight);
    color: var(--color-primary);
    font-weight: 700;
    border-bottom: 2px solid var(--border-color) !important;
}
.iso-dft-table thead tr:nth-child(2) th {
    background-color: var(--bg-input);
    color: var(--text-primary);
    font-weight: 600;
}
.iso-dft-table thead tr:nth-child(3) th,
.iso-dft-table thead tr:nth-child(4) th {
    background-color: var(--bg-card);
    font-size: 0.7rem;
    color: var(--text-secondary);
}
.iso-dft-table tbody tr.group-start td {
    border-top: 2px solid rgba(59, 130, 246, 0.45) !important;
}
.iso-dft-table tbody tr.cat-even {
    background-color: rgba(255, 255, 255, 0.025);
}
.iso-dft-table tbody tr.cat-odd {
    background-color: rgba(0, 0, 0, 0.12);
}
[data-theme="light"] .iso-dft-table tbody tr.cat-even {
    background-color: #f8fafc;
}
[data-theme="light"] .iso-dft-table tbody tr.cat-odd {
    background-color: #ffffff;
}
.iso-dft-table td.cat-badge-cell {
    font-weight: 800;
    font-size: 1.05rem;
    background-color: var(--bg-input) !important;
}
.iso-dft-table td.kriter-cell {
    font-weight: 700;
    color: var(--text-primary);
    background-color: var(--bg-input);
    font-size: 0.78rem;
}
.iso-dft-table td.val-dash {
    color: var(--text-muted);
    opacity: 0.35;
    font-weight: bold;
}
.iso-dft-table td.val-num {
    font-weight: 700;
    color: var(--text-primary);
}
.iso-dft-table td.val-star {
    color: var(--color-primary);
    font-style: italic;
    font-weight: bold;
}

/* ISO 12944 Test Süreleri Table */
.test-times-table {
    width: 100%;
    border-collapse: collapse !important;
    margin-bottom: 1.5rem;
    font-size: 0.85rem;
}
.test-times-table th, 
.test-times-table td {
    border: 1px solid var(--border-color) !important;
    text-align: center;
    vertical-align: middle;
    padding: 10px 8px;
}
.test-times-table thead th {
    background-color: var(--bg-highlight);
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.3;
    border-bottom: 2px solid var(--border-color) !important;
}
.test-times-table tbody tr.cat-even {
    background-color: rgba(255, 255, 255, 0.025);
}
.test-times-table tbody tr.cat-odd {
    background-color: rgba(0, 0, 0, 0.12);
}
[data-theme="light"] .test-times-table tbody tr.cat-even {
    background-color: #f8fafc;
}
[data-theme="light"] .test-times-table tbody tr.cat-odd {
    background-color: #ffffff;
}
.test-times-table tbody tr.group-start td {
    border-top: 2px solid rgba(59, 130, 246, 0.45) !important;
}
.test-times-table td.cat-badge-cell {
    font-weight: 800;
    font-size: 1.05rem;
    letter-spacing: 0.5px;
    background-color: var(--bg-input) !important;
}

.test-times-table td.dur-low { color: var(--text-secondary); font-size: 0.85rem; }
.test-times-table td.dur-med { color: var(--text-primary); font-weight: 600; font-size: 0.85rem; }
.test-times-table td.dur-high { color: var(--color-primary); font-weight: 700; font-size: 0.85rem; }

.test-times-table td.val-dash {
    color: var(--text-muted);
    opacity: 0.35;
    font-weight: bold;
}
.test-times-table td.val-num {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 0.92rem;
}