/* CSS Stylesheet for Free Online Universal Unit Converter - AhteVerse */

/* ============================================
   NUCLEAR VIEWPORT CONTAINMENT
   Nothing escapes the screen. Period.
   ============================================ */
html {
    overflow-x: hidden;
    max-width: 100%;
    width: 100%;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body.tool-page {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    font-family: var(--font-body);
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
}

/* Fix the drawer-overlay 100vw issue from universal main.css */
.drawer-overlay {
    width: 100% !important;
    max-width: 100% !important;
}

/* Force every direct child of body to stay in bounds */
body.tool-page > * {
    max-width: 100vw;
    overflow-x: hidden;
}

/* Override universal .container to be bulletproof */
.container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    overflow-x: hidden;
}

/* ============================================
   TOOL PAGE LAYOUT
   ============================================ */

.tool-content {
    padding: var(--space-xl) 0;
    margin-top: 40px;
    width: 100%;
    max-width: 100%;
}

.tool-header {
    margin-bottom: var(--space-xl);
}

.tool-title {
    font-family: var(--font-heading);
    font-size: clamp(1.6rem, 4vw, 3rem);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: var(--space-xs);
    color: var(--text-primary);
    word-break: break-word;
    overflow-wrap: break-word;
}

.tool-title span {
    color: var(--magenta);
    text-shadow: var(--glow-magenta);
}

.tool-subtitle {
    font-family: var(--font-body);
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.5;
}

/* Tool Workspace */
.tool-workspace {
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

/* Workspace Grid — 2-column on desktop, 1-column on mobile */
.workspace-grid {
    display: grid;
    grid-template-columns: 2.8fr 1.2fr;
    gap: var(--space-lg);
    align-items: start;
    width: 100%;
    max-width: 100%;
    min-width: 0;
}

/* Force grid children to not overflow */
.workspace-main-panel {
    min-width: 0;
    max-width: 100%;
    overflow: hidden;
}

/* ============================================
   GLASS CARD
   ============================================ */
.glass-card {
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-md);
    transition: border-color 0.3s, box-shadow 0.3s;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    overflow: hidden;
}

.glass-card:hover {
    border-color: rgba(255, 0, 255, 0.15);
}

/* ============================================
   TAB NAVIGATION
   ============================================ */
.tabs-navigation {
    display: flex;
    gap: 6px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1px;
    margin-bottom: var(--space-lg);
    overflow-x: auto;
    overflow-y: hidden;
    white-space: nowrap;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    -ms-overflow-style: none;
    width: 100%;
}

.tabs-navigation::-webkit-scrollbar {
    display: none;
}

.tab-btn {
    padding: 12px 18px;
    border-radius: 8px 8px 0 0;
    border: 1px solid transparent;
    border-bottom: none;
    background: transparent;
    color: var(--text-secondary);
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: -1px;
    flex-shrink: 0;
}

.tab-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.02);
}

.tab-btn.active {
    color: var(--magenta);
    background: var(--glass-bg);
    border-color: var(--glass-border);
    border-bottom: 2px solid var(--magenta);
    text-shadow: var(--glow-magenta);
}

/* ============================================
   CONVERTER WORKSPACE
   ============================================ */
.converter-workspace {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    width: 100%;
    max-width: 100%;
    min-width: 0;
}

.input-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    min-width: 0;
}

.input-group, .select-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-group label, .select-group label {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-group input[type="number"] {
    width: 100%;
    max-width: 100%;
    padding: 14px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.2);
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-size: 1.2rem;
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.input-group input[type="number"]:focus {
    border-color: var(--magenta);
    box-shadow: 0 0 10px rgba(255, 0, 255, 0.1);
}

/* Hide default number input arrows */
.input-group input[type="number"]::-webkit-outer-spin-button,
.input-group input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
.input-group input[type="number"] {
    -moz-appearance: textfield;
}

.select-group select {
    width: 100%;
    max-width: 100%;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.2);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    outline: none;
    cursor: pointer;
    transition: border-color 0.3s;
}

.select-group select:focus {
    border-color: var(--magenta);
}

.select-group select option {
    background-color: #0d0d15;
    color: var(--text-primary);
}

.swap-icon {
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 10px;
    transition: all 0.3s ease;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.swap-icon:hover {
    color: var(--magenta);
    transform: rotate(180deg) scale(1.1);
    text-shadow: var(--glow-magenta);
}

/* ============================================
   SIDEBAR
   ============================================ */
.workspace-sidebar {
    position: sticky;
    top: 100px;
    min-width: 0;
    max-width: 100%;
    overflow: hidden;
}

.sidebar-sticky {
    padding: var(--space-lg);
}

.sidebar-title {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--space-xs);
}

.conversions-guide {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.guide-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    font-size: 0.88rem;
    line-height: 1.4;
    color: var(--text-secondary);
    min-width: 0;
}

.guide-item > span:last-child {
    min-width: 0;
    overflow-wrap: break-word;
    word-break: break-word;
}

.guide-badge {
    font-family: var(--font-heading);
    font-size: 0.65rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    min-width: 50px;
    text-align: center;
    border: 1px solid var(--border-color);
    flex-shrink: 0;
}

/* ============================================
   TOAST ALERTS
   ============================================ */
#toast-wrapper {
    position: fixed;
    bottom: 25px;
    right: 25px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
    max-width: calc(100vw - 50px);
}

.toast-alert {
    padding: 12px 20px;
    border-radius: 8px;
    background: rgba(18, 18, 18, 0.95);
    border-left: 4px solid var(--magenta);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 600;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    pointer-events: auto;
    animation: toastFadeIn 0.3s forwards, toastFadeOut 0.3s 2.7s forwards;
    display: flex;
    align-items: center;
    gap: 8px;
    max-width: 100%;
}

.toast-alert.success {
    border-left-color: var(--electric-blue);
}

@keyframes toastFadeIn {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes toastFadeOut {
    from { opacity: 1; transform: translateX(0); }
    to { opacity: 0; transform: translateX(30px); }
}

/* ============================================
   SEO CONTENT & FAQ
   ============================================ */
.seo-content-section {
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-color);
    overflow-wrap: break-word;
    word-break: break-word;
    width: 100%;
    max-width: 100%;
}

.seo-content-section h2 {
    font-family: var(--font-heading);
    font-size: clamp(1.2rem, 3vw, 1.6rem);
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.seo-content-section p {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

.seo-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
    width: 100%;
    max-width: 100%;
}

.seo-col {
    min-width: 0;
    overflow: hidden;
}

.seo-col h3 {
    font-family: var(--font-heading);
    font-size: clamp(0.95rem, 2vw, 1.15rem);
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
}

.seo-col p {
    font-size: 0.92rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.seo-faq-container {
    padding: var(--space-xl);
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

.faq-accordion-wrapper {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.faq-details {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.01);
    transition: all 0.3s ease;
    overflow: hidden;
}

.faq-details:hover,
.faq-details[open] {
    border-color: rgba(255, 0, 255, 0.2);
    background: rgba(255, 255, 255, 0.02);
}

.faq-summary {
    padding: 16px var(--space-md);
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    list-style: none;
    position: relative;
    padding-right: 40px;
    user-select: none;
}

.faq-summary::after {
    content: "▼";
    position: absolute;
    right: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.75rem;
    color: var(--text-secondary);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    opacity: 0.7;
}

.faq-details[open] .faq-summary::after {
    transform: translateY(-50%) rotate(180deg);
    color: var(--magenta);
}

.faq-summary::-webkit-details-marker {
    display: none;
}

.faq-answer {
    padding: var(--space-md);
    border-top: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.1);
    animation: slideDown 0.3s ease-out;
}

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

.faq-answer p {
    font-size: 0.92rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0;
}


/* =========================================================
   RESPONSIVE — TABLET (≤ 1024px)
   ========================================================= */
@media (max-width: 1024px) {
    .workspace-grid {
        grid-template-columns: 1fr;
    }
    
    .workspace-sidebar {
        position: static;
    }
}

/* =========================================================
   RESPONSIVE — SMALL TABLET (≤ 768px)
   ========================================================= */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-md);
    }

    .glass-card {
        padding: var(--space-md);
    }
    
    .seo-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .seo-faq-container {
        padding: var(--space-md);
    }
    
    .sidebar-sticky {
        padding: var(--space-md);
    }
    
    .tab-btn {
        padding: 10px 14px;
        font-size: 0.8rem;
    }
}

/* =========================================================
   RESPONSIVE — MOBILE (≤ 600px)
   ========================================================= */
@media (max-width: 600px) {

    .container {
        padding: 0 12px;
    }

    .tool-content {
        padding: var(--space-md) 0;
        margin-top: 10px;
    }
    
    .tool-header {
        margin-bottom: var(--space-md);
    }

    .tool-subtitle {
        font-size: 0.9rem;
    }

    /* Segmented Tab Control — horizontal scroll pills */
    .tabs-navigation {
        background: rgba(0, 0, 0, 0.3);
        border: 1px solid var(--border-color);
        border-radius: 12px;
        padding: 4px;
        gap: 4px;
        border-bottom: none;
        margin-bottom: var(--space-md);
    }
    
    .tab-btn {
        padding: 8px 10px;
        font-size: 0.68rem;
        border-radius: 8px;
        border: 1px solid transparent;
        margin-bottom: 0;
        text-align: center;
        background: transparent;
        letter-spacing: 0;
    }
    
    .tab-btn.active {
        background: rgba(255, 0, 255, 0.1);
        border: 1px solid rgba(255, 0, 255, 0.2);
    }

    /* Glass card mobile */
    .glass-card {
        padding: 10px;
        border-radius: 12px;
        margin-bottom: var(--space-sm);
    }

    /* Converter Workspace stacked on mobile */
    .converter-workspace {
        flex-direction: column;
    }
    
    .swap-icon {
        transform: rotate(90deg);
    }
    
    .swap-icon:hover {
        transform: rotate(270deg) scale(1.1);
    }

    /* Form inputs compact */
    .input-group label, .select-group label {
        font-size: 0.72rem;
    }
    
    .input-group input[type="number"] {
        padding: 10px;
        font-size: 1rem;
    }

    .select-group select {
        padding: 10px;
        font-size: 0.85rem;
    }
    
    /* SEO section */
    .seo-content-section {
        margin-top: var(--space-lg);
        padding-top: var(--space-lg);
    }

    .seo-content-section p {
        font-size: 0.88rem;
    }

    .seo-faq-container {
        padding: 10px;
        border-radius: 12px;
    }

    .faq-summary {
        padding: 10px;
        font-size: 0.82rem;
        padding-right: 30px;
    }

    .faq-summary::after {
        right: 10px;
    }

    .faq-answer {
        padding: 10px;
    }

    .faq-answer p {
        font-size: 0.82rem;
    }
    
    /* Sidebar compact */
    .sidebar-sticky {
        padding: 10px;
    }
    
    .sidebar-title {
        font-size: 0.95rem;
    }
    
    .guide-item {
        font-size: 0.8rem;
    }
    
    .guide-badge {
        font-size: 0.58rem;
        min-width: 44px;
        padding: 2px 4px;
    }

    /* Toast */
    #toast-wrapper {
        left: 10px;
        right: 10px;
        bottom: 10px;
        max-width: calc(100vw - 20px);
    }
    .toast-alert {
        min-width: unset;
        width: 100%;
    }
}

/* =========================================================
   RESPONSIVE — VERY SMALL SCREENS (≤ 380px)
   ========================================================= */
@media (max-width: 380px) {
    .container {
        padding: 0 8px;
    }

    .tool-title {
        font-size: 1.2rem;
        letter-spacing: 1px;
    }

    .tool-subtitle {
        font-size: 0.78rem;
    }

    .tab-btn {
        padding: 6px 7px;
        font-size: 0.6rem;
    }

    .glass-card {
        padding: 8px;
        border-radius: 10px;
    }

    .faq-summary {
        font-size: 0.75rem;
        padding: 8px;
        padding-right: 24px;
    }
    
    .faq-summary::after {
        font-size: 0.55rem;
        right: 8px;
    }

    .seo-content-section h2 {
        font-size: 1rem;
    }
}

/* =========================================================
   SEO KEYWORD DIRECTORY GRID
   ========================================================= */
.seo-keywords-container {
    margin-top: var(--space-xl);
    padding: var(--space-lg);
    border-radius: 16px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    width: 100%;
}

.seo-keyword-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-md);
}

.seo-keyword-col {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.seo-keyword-col h4 {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 6px;
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.seo-keyword-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.seo-keyword-list li {
    font-size: 0.82rem;
    line-height: 1.4;
}

.seo-keyword-list a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease, text-shadow 0.2s ease;
}

.seo-keyword-list a:hover {
    color: var(--magenta);
    text-shadow: var(--glow-magenta);
}

@media (max-width: 600px) {
    .seo-keyword-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-md);
    }
}

@media (max-width: 400px) {
    .seo-keyword-grid {
        grid-template-columns: 1fr;
    }
}