/* app.v1.css | purpose: base layout and component styles for UnmaskedPolitics .com */

/* Container utility */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--gutter);
}

/* Card utility component */
.card {
    background: var(--color-bg);
    border: 1px solid rgba(0,0,0,.08);
    border-radius: var(--radius);
    padding: 1rem;
    box-shadow: var(--shadow);
}

.card h2 {
    margin: 0 0 var(--space-m) 0;
    font-size: var(--font-l);
    color: var(--color-text);
}

[data-theme="dark"] .card {
    background: color-mix(in srgb, var(--color-bg) 82%, #000 18%);
    border-color: rgba(255,255,255,.12);
}

/* Link hover underlines */
a {
    color: var(--color-accent);
    text-decoration: none;
    transition: text-decoration 0.2s ease;
}

a:hover {
    text-decoration: underline;
}

/* Basic typography */
h1, h2, h3, h4, h5, h6 {
    margin: 0 0 var(--space-m) 0;
    line-height: var(--line-height-tight);
    color: var(--color-text);
}

h1 { font-size: var(--font-xxl); }
h2 { font-size: var(--font-xl); }
h3 { font-size: var(--font-l); }

p {
    margin: 0 0 var(--space-m) 0;
    line-height: var(--line-height);
}

ul, ol {
    margin: 0 0 var(--space-m) 0;
    padding-left: var(--space-l);
}

li {
    margin-bottom: var(--space-s);
}

/* Header stays on top with 3-zone layout */
.up-header { 
    background: var(--color-bg); 
    border-bottom: 1px solid rgba(0,0,0,.08);
    position: sticky; 
    top: 0; 
    z-index: 1000;
}
[data-theme="dark"] .up-header { 
    border-bottom-color: rgba(255,255,255,.08); 
}

/* 3-Zone Flex Layout */
.up-header-row { 
    display: flex; 
    align-items: center; 
    min-height: 56px;
    position: relative;
}

/* Left Zone: Brand */
.header-left {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
}

.up-header-row .brand { 
    font-weight: 700; 
    font-size: var(--font-l); 
    text-decoration: none; 
    color: var(--color-text); 
}

/* Center Zone: Search (absolutely centered) */
.header-center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

/* Right Zone: Navigation */
.header-right {
    flex: 0 0 auto;
    margin-left: auto;
    display: flex;
    align-items: center;
}

/* Header search */
.up-search { 
    display: flex; 
    align-items: center; 
    gap: .25rem;
}

.up-search input[type="search"] {
    min-width: 320px; 
    padding: .4rem .6rem; 
    border: 1px solid rgba(0,0,0,.15); 
    border-radius: var(--radius);
    background: var(--color-bg); 
    color: var(--color-text);
}

[data-theme="dark"] .up-search input[type="search"] { 
    border-color: rgba(255,255,255,.2); 
}

.up-search button { 
    border: 1px solid transparent; 
    background: none; 
    padding: .35rem .45rem; 
    cursor: pointer; 
}

/* Header navigation */
.up-nav { 
    display: flex; 
    align-items: center; 
    gap: .6rem; 
}

.up-nav a { 
    text-decoration: none; 
    color: var(--color-text); 
}

.up-nav a:hover { 
    text-decoration: underline; 
}

.up-nav .btn-login { 
    padding: .35rem .6rem; 
    border: 1px solid rgba(0,0,0,.15); 
    border-radius: var(--radius); 
}

[data-theme="dark"] .up-nav .btn-login { 
    border-color: rgba(255,255,255,.2); 
}

.up-nav .btn-cta { 
    padding: .4rem .7rem; 
    border-radius: var(--radius); 
    background: var(--color-accent); 
    color: #fff; 
    text-decoration: none; 
}

/* Header controls - optimized gear icon */
.up-theme, .up-settings {
    display: inline-flex; 
    align-items: center; 
    justify-content: center;
    width: 36px; 
    height: 36px; 
    border-radius: 8px; 
    background: transparent;
    border: 1px solid rgba(0,0,0,.15); 
    color: #6c757d; /* Optimized neutral gray */
    cursor: pointer;
    transition: background .15s ease, color .15s ease, border-color .15s ease;
}

.up-theme .icon, .up-settings .icon { 
    display: block; 
}

.up-theme:hover, .up-settings:hover { 
    background: rgba(0,0,0,.05); 
    color: var(--color-accent); 
}

.up-theme:focus-visible, .up-settings:focus-visible { 
    outline: 2px solid var(--color-accent); 
    outline-offset: 2px; 
}

[data-theme="dark"] .up-theme, [data-theme="dark"] .up-settings { 
    color: #9ca3af; /* Better dark mode gray */
    border-color: rgba(255,255,255,.2); 
}

[data-theme="dark"] .up-theme:hover, [data-theme="dark"] .up-settings:hover { 
    background: rgba(255,255,255,.06); 
}

/* Settings link fix */
.up-settings {
    text-decoration: none;
}

/* Responsive header: mobile behavior */
@media (max-width: 768px) {
    .up-header-row {
        flex-wrap: wrap;
        min-height: auto;
        padding: .5rem 0;
    }
    
    /* Top row: Logo left, controls right */
    .header-left {
        order: 1;
        flex: 1;
    }
    
    .header-right {
        order: 2;
        margin-left: 0;
    }
    
    /* Second row: Search bar spanning full width */
    .header-center {
        order: 3;
        position: static;
        transform: none;
        width: 100%;
        margin-top: .75rem;
        z-index: auto;
    }
    
    .up-search {
        width: 100%;
        justify-content: center;
    }
    
    .up-search input[type="search"] {
        min-width: 0;
        width: 100%;
        max-width: 400px;
    }
}

@media (max-width: 560px) {
    .up-search input[type="search"] {
        max-width: 280px;
    }
}

/* Header controls styling remains the same */

/* === INDEPENDENT RAIL SYSTEM === */
/* Layout variables */
:root {
    --rail-left-width: 280px;
    --rail-right-width: 340px;
    --rail-padding: calc(var(--gutter) * .75);
    --divider-light: rgba(0,0,0,.08);
    --divider-dark: rgba(255,255,255,.12);
}

/* Main layout container */
.layout-container {
    position: relative;
    min-height: calc(100vh - 56px); /* Account for header */
}

/* Left Rail: Fixed to left edge, independent scrolling */
.left-rail-fixed {
    position: fixed;
    top: 56px; /* Below header */
    left: 0;
    width: var(--rail-left-width);
    height: calc(100vh - 56px);
    padding: var(--rail-padding);
    background: var(--color-bg);
    border-right: 1px solid var(--divider-light);
    z-index: 100;
    overflow: hidden;
}

[data-theme="dark"] .left-rail-fixed {
    border-right-color: var(--divider-dark);
}

.left-rail-fixed .rail-scroll {
    height: 100%;
    overflow-y: auto;
    overflow-x: hidden;
    overscroll-behavior: contain;
    padding-right: .5rem;
}

.left-rail-fixed .rail-scroll::-webkit-scrollbar {
    width: 6px;
}

.left-rail-fixed .rail-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.left-rail-fixed .rail-scroll::-webkit-scrollbar-thumb {
    background: rgba(0,0,0,.2);
    border-radius: 3px;
}

[data-theme="dark"] .left-rail-fixed .rail-scroll::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,.2);
}

.left-rail-fixed .rail-stack {
    display: grid;
    gap: var(--gutter);
    padding-bottom: 2rem;
}

/* Right Rail: Fixed to right edge, no scrolling */
.right-rail-fixed {
    position: fixed;
    top: 56px; /* Below header */
    right: 0;
    width: var(--rail-right-width);
    height: calc(100vh - 56px);
    padding: var(--rail-padding);
    background: var(--color-bg);
    border-left: 1px solid var(--divider-light);
    z-index: 100;
    overflow: hidden;
}

[data-theme="dark"] .right-rail-fixed {
    border-left-color: var(--divider-dark);
}

.right-rail-fixed .rail-stack {
    display: grid;
    gap: var(--gutter);
}

/* Center: Fluid content that expands/contracts */
.center-content {
    margin-left: var(--rail-left-width);
    margin-right: var(--rail-right-width);
    min-height: calc(100vh - 56px);
    padding: calc(var(--gutter) * 1.5) calc(var(--gutter) * 2);
    position: relative;
    z-index: 10;
}

.center-content .center-inner {
    max-width: 1200px;
    margin: 0 auto;
}

/* Hero card */
.hero.big {
    padding: 2.25rem 2rem;
    background: linear-gradient(180deg, rgba(0,122,255,.24), rgba(0,122,255,.07));
    border-radius: var(--radius);
    margin-bottom: 2rem;
}

.hero.big h1 { 
    font-weight: 800; 
    font-size: clamp(2rem, 3vw, 2.8rem); 
    margin: 0 0 .6rem; 
}

.hero.big .sub { 
    opacity: .92; 
    max-width: 72ch; 
}

.hero .actions { 
    display: flex; 
    gap: .9rem; 
    margin-top: 1.1rem; 
}

/* Feature cards - responsive to center width */
.features {
    display: grid;
    gap: calc(var(--gutter) * 1.1);
    grid-template-columns: repeat(5, minmax(200px, 1fr));
    margin-bottom: 2rem;
}

/* Center-width responsive breakpoints */
@media (max-width: 1800px) {
    .features {
        grid-template-columns: repeat(4, minmax(220px, 1fr));
    }
}

@media (max-width: 1500px) {
    .features {
        grid-template-columns: repeat(3, minmax(240px, 1fr));
    }
}

@media (max-width: 1200px) {
    .features {
        grid-template-columns: repeat(2, minmax(280px, 1fr));
    }
}

@media (max-width: 900px) {
    .features {
        grid-template-columns: 1fr;
    }
}

.feature.card { 
    text-align: center; 
    padding: 1.4rem; 
    display: grid; 
    gap: .5rem; 
}

.feature .kicker { 
    opacity: .75; 
    font-size: 1.5rem;
}

.feature .cta-row { 
    margin-top: .25rem; 
}

/* Sidebar groups */
.sidebar-group { 
    display: grid; 
    gap: .5rem; 
}

.sidebar-group h3 { 
    font-size: var(--font-m); 
    opacity: .7; 
    margin: 0; 
    letter-spacing: .02em; 
}

.sidebar-nav { 
    display: grid; 
    gap: .35rem; 
}

.sidebar-nav a { 
    text-decoration: none; 
    padding: .25rem .5rem;
    border-radius: 4px;
    transition: background-color .15s ease;
}

.sidebar-nav a:hover { 
    background: rgba(0,0,0,.05);
    text-decoration: none;
}

[data-theme="dark"] .sidebar-nav a:hover {
    background: rgba(255,255,255,.05);
}

/* Feed cards */
.feed-stack { 
    display: grid; 
    gap: .75rem; 
}

.feed-card { 
    padding: .75rem; 
    border: 1px solid rgba(0,0,0,.08); 
    border-radius: var(--radius); 
    background: var(--color-bg); 
}

[data-theme="dark"] .feed-card { 
    border-color: rgba(255,255,255,.12); 
}

.feed-card time { 
    display: block; 
    font-size: var(--font-s); 
    opacity: .7; 
    margin-bottom: .25rem; 
}

.feed-card .title { 
    font-weight: 700; 
}

/* Footer */
.page-footer {
    text-align: center;
    padding: 2rem;
    margin-left: var(--rail-left-width);
    margin-right: var(--rail-right-width);
    opacity: .7;
    font-size: var(--font-s);
    border-top: 1px solid var(--divider-light);
    background: var(--color-bg);
}

[data-theme="dark"] .page-footer {
    border-top-color: var(--divider-dark);
}

/* Utility classes */
.muted { 
    opacity: .75; 
    font-size: var(--font-m); 
    margin: 0 0 .5rem 0; 
}

.stack { 
    display: grid; 
    gap: .35rem; 
}

.actions { 
    display: flex; 
    gap: .75rem; 
    align-items: center; 
}

.btn-cta { 
    padding: .5rem .8rem; 
    border-radius: var(--radius); 
    background: var(--color-accent); 
    color: #fff; 
    text-decoration: none; 
}

.link { 
    text-decoration: underline; 
}

.small { 
    font-size: var(--font-s); 
    opacity: .8; 
}

/* Astrid chat positioning */
.astrid-fab {
    position: fixed;
    right: calc(var(--rail-right-width) + 24px);
    bottom: 24px;
    z-index: 1001;
}

/* === TABLET AND MOBILE RESPONSIVE === */
/* Tablet: Stack right rail below content */
@media (max-width: 1280px) {
    :root {
        --rail-right-width: 0px;
    }
    
    .right-rail-fixed {
        position: static;
        width: 100%;
        height: auto;
        border-left: none;
        border-top: 1px solid var(--divider-light);
        margin-top: 2rem;
    }
    
    .center-content {
        margin-right: 0;
    }
    
    .page-footer {
        margin-right: 0;
    }
    
    .astrid-fab {
        right: 24px;
    }
    
    [data-theme="dark"] .right-rail-fixed {
        border-top-color: var(--divider-dark);
    }
}

/* Mobile: Stack all content */
@media (max-width: 768px) {
    :root {
        --rail-left-width: 0px;
    }
    
    .left-rail-fixed {
        position: static;
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--divider-light);
        overflow: visible;
    }
    
    .left-rail-fixed .rail-scroll {
        height: auto;
        overflow: visible;
        padding-right: 0;
    }
    
    .center-content {
        margin-left: 0;
        padding: var(--gutter);
    }
    
    .page-footer {
        margin-left: 0;
    }
    
    .astrid-fab {
        right: 16px;
        bottom: 16px;
    }
    
    [data-theme="dark"] .left-rail-fixed {
        border-bottom-color: var(--divider-dark);
    }
}

/* Center-width observer integration */
html[data-center="narrow"] .features {
    grid-template-columns: repeat(2, minmax(240px, 1fr));
}

/* Container queries for even smoother responsiveness */
.center-content {
    container-type: inline-size;
    container-name: center;
}

@container center (max-width: 980px) {
    .features {
        grid-template-columns: repeat(2, minmax(240px, 1fr));
    }
}

@container center (max-width: 640px) {
    .features {
        grid-template-columns: 1fr;
    }
}