/* ==========================================================================
   IP & GeoIP Lookup - Modern Minimalist Stylesheet
   ========================================================================== */

:root {
    --bg-page: #f8fafc;
    --bg-card: #ffffff;
    --bg-subtle: #f1f5f9;
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-primary-subtle: #eff6ff;
    --color-success: #10b981;
    --color-success-subtle: #ecfdf5;
    --color-warning: #f59e0b;
    --color-warning-subtle: #fffbeb;
    --color-error: #ef4444;
    --color-error-subtle: #fef2f2;
    
    --icon-blue: #3b82f6;
    --icon-green: #10b981;
    --icon-purple: #8b5cf6;
    --icon-amber: #f59e0b;
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.05);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.04);
    
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-page: #0b0f19;
        --bg-card: #131b2e;
        --bg-subtle: #1e293b;
        --border-color: #1e293b;
        --border-hover: #334155;
        
        --text-primary: #f8fafc;
        --text-secondary: #94a3b8;
        --text-muted: #64748b;
        
        --color-primary: #3b82f6;
        --color-primary-hover: #60a5fa;
        --color-primary-subtle: rgba(59, 130, 246, 0.15);
        
        --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
        --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4);
        --shadow-lg: 0 10px 20px -3px rgb(0 0 0 / 0.5);
    }
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-page);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.page-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 1040px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

/* --------------------------------------------------------------------------
   Hero Section & IP Display
   -------------------------------------------------------------------------- */
.hero-section {
    padding: 3rem 0 2rem 0;
    text-align: center;
}

.badge-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.service-badge, .version-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.25rem 0.65rem;
    border-radius: var(--radius-full);
}

.service-badge {
    background-color: var(--color-primary-subtle);
    color: var(--color-primary);
    border: 1px solid rgba(37, 99, 235, 0.15);
}

.pulse-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--color-success);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    }
    70% {
        transform: scale(1);
        box-shadow: 0 0 0 6px rgba(16, 185, 129, 0);
    }
    100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

.version-badge {
    background-color: var(--bg-subtle);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.hero-title {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.75rem;
}

.ip-display-container {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 0.5rem;
}

.ip-text {
    font-size: clamp(1.5rem, 4.5vw, 2.75rem);
    font-weight: 700;
    color: var(--text-primary);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    letter-spacing: -0.02em;
    line-height: 1.2;
    text-align: center;
    max-width: 100%;
    min-height: 1.2em;
    display: flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    word-break: normal;
    overflow-wrap: normal;
    transition: font-size var(--transition-base);
}

.ip-text.ip-text-v6 {
    font-size: clamp(1rem, 3.2vw, 1.85rem);
    white-space: normal;
    word-break: break-word;
    overflow-wrap: anywhere;
}

.ip-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.5rem 1.15rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
    outline: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn:active:not(:disabled) {
    transform: translateY(1px);
}

.btn:focus-visible {
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.35);
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-hover);
}

.btn-secondary {
    background-color: var(--bg-card);
    color: var(--text-secondary);
    border-color: var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--bg-subtle);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.btn-sm {
    font-size: 0.8rem;
    padding: 0.35rem 0.75rem;
}

.btn-outline {
    background-color: transparent;
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-outline:hover {
    background-color: var(--bg-subtle);
}

/* Toast */
.toast {
    position: absolute;
    bottom: -2.75rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background-color: var(--text-primary);
    color: var(--bg-card);
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity var(--transition-base), transform var(--transition-base);
    pointer-events: none;
    z-index: 20;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

/* Notice & Error Banners */
.notice-banner {
    margin-top: 1.5rem;
    background-color: var(--color-primary-subtle);
    border: 1px solid rgba(37, 99, 235, 0.2);
    border-radius: var(--radius-md);
    padding: 0.85rem 1.25rem;
    text-align: left;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.notice-content {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.icon-info {
    color: var(--color-primary);
    flex-shrink: 0;
}

.demo-presets {
    margin-top: 0.65rem;
    padding-top: 0.65rem;
    border-top: 1px solid rgba(37, 99, 235, 0.15);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.presets-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.preset-btn {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0.2rem 0.5rem;
    font-size: 0.75rem;
    font-family: monospace;
    color: var(--color-primary);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.preset-btn:hover {
    background-color: var(--bg-subtle);
}

.error-banner {
    margin-top: 1.5rem;
    background-color: var(--color-error-subtle);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.85rem;
    text-align: left;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
    color: var(--color-error);
}

.error-text {
    flex-grow: 1;
}

.error-text strong {
    display: block;
    font-size: 0.9rem;
    color: #b91c1c;
}

.error-text p {
    font-size: 0.825rem;
    color: #7f1d1d;
    margin-top: 0.2rem;
}

/* --------------------------------------------------------------------------
   Cards Grid
   -------------------------------------------------------------------------- */
.main-content {
    flex-grow: 1;
    padding-bottom: 3rem;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.35rem;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--border-hover);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.card-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.card-icon-blue {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--icon-blue);
}

.card-icon-green {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--icon-green);
}

.card-icon-purple {
    background-color: rgba(139, 92, 246, 0.1);
    color: var(--icon-purple);
}

.card-icon-amber {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--icon-amber);
}

.card-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Data List inside Card */
.data-list {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.data-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    font-size: 0.875rem;
    gap: 1rem;
}

.data-label {
    color: var(--text-secondary);
    font-weight: 400;
    flex-shrink: 0;
}

.data-value {
    color: var(--text-primary);
    font-weight: 500;
    text-align: right;
    word-break: break-word;
}

.font-mono {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.card-icon-slate {
    background-color: rgba(100, 116, 139, 0.12);
    color: #64748b;
}

.data-value-with-flag {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    text-align: right;
}

.country-flag {
    font-size: 1.25rem;
    line-height: 1;
    display: inline-block;
}

/* Headers Viewer Card */
.headers-card {
    margin-top: 1.5rem;
}

.headers-header {
    cursor: pointer;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: opacity var(--transition-fast);
    padding: 0.25rem 0;
    border-bottom: none;
    margin-bottom: 0;
}

.headers-header:hover {
    opacity: 0.85;
}

.headers-header-title {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    flex-grow: 1;
}

.headers-count-badge {
    font-size: 0.725rem;
    font-weight: 600;
    padding: 0.15rem 0.5rem;
    border-radius: var(--radius-full);
    background-color: var(--bg-subtle);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.icon-chevron {
    color: var(--text-muted);
    transition: transform var(--transition-base);
    flex-shrink: 0;
}

.headers-card.open .icon-chevron {
    transform: rotate(180deg);
}

.headers-content {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.headers-table {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    background-color: var(--bg-subtle);
    padding: 0.85rem 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    font-size: 0.825rem;
}

.header-row {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.25rem 0;
    border-bottom: 1px dashed rgba(148, 163, 184, 0.2);
}

.header-row:last-child {
    border-bottom: none;
}

.header-name {
    color: var(--color-primary);
    font-weight: 600;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    flex-shrink: 0;
}

.header-val {
    color: var(--text-primary);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    word-break: break-all;
    text-align: right;
}

/* --------------------------------------------------------------------------
   Map Card & Container
   -------------------------------------------------------------------------- */
.map-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.35rem;
    box-shadow: var(--shadow-sm);
    margin-top: 1.5rem;
}

.map-header {
    border-bottom: none;
    margin-bottom: 0.85rem;
    padding-bottom: 0;
}

.map-disclaimer {
    font-size: 0.775rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
    line-height: 1.4;
}

.map-container {
    height: 340px;
    width: 100%;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    background-color: var(--bg-subtle);
    z-index: 1;
}

/* --------------------------------------------------------------------------
   Skeleton Loading State
   -------------------------------------------------------------------------- */
.skeleton {
    position: relative;
    overflow: hidden;
    background-color: var(--bg-subtle);
    border-radius: var(--radius-sm);
    color: transparent !important;
}

.skeleton::after {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    transform: translateX(-100%);
    background-image: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0) 0,
        rgba(255, 255, 255, 0.4) 50%,
        rgba(255, 255, 255, 0) 100%
    );
    animation: shimmer 1.6s infinite;
    content: '';
}

@media (prefers-color-scheme: dark) {
    .skeleton::after {
        background-image: linear-gradient(
            90deg,
            rgba(255, 255, 255, 0) 0,
            rgba(255, 255, 255, 0.08) 50%,
            rgba(255, 255, 255, 0) 100%
        );
    }
}

@keyframes shimmer {
    100% {
        transform: translateX(100%);
    }
}

.skeleton.skeleton-badge {
    width: 50px;
    height: 22px;
}

.skeleton.skeleton-ip {
    width: min(320px, 80vw);
    height: 3.25rem;
    border-radius: var(--radius-md);
}

.skeleton.skeleton-line {
    width: 110px;
    height: 16px;
}

/* --------------------------------------------------------------------------
   Footer / Attribution
   -------------------------------------------------------------------------- */
.site-footer {
    margin-top: auto;
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-card);
}

.footer-content {
    text-align: center;
    font-size: 0.825rem;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.attribution a {
    color: var(--text-secondary);
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color var(--transition-fast);
}

.attribution a:hover {
    color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Responsive Adjustments
   -------------------------------------------------------------------------- */
@media (max-width: 640px) {
    .hero-section {
        padding: 2rem 0 1.5rem 0;
    }

    .ip-text {
        font-size: clamp(1.25rem, 5.2vw, 1.85rem);
        white-space: nowrap;
    }

    .ip-text.ip-text-v6 {
        font-size: clamp(0.9rem, 3.5vw, 1.35rem);
        white-space: normal;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    .card {
        padding: 1rem 1.15rem;
    }
    
    .map-container {
        height: 280px;
    }

    .data-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.2rem;
    }

    .data-value {
        text-align: left;
    }
}