/*
Theme Name: TrollKhach
Theme URI: https://trollkhach.com
Author: TrollKhach Team
Author URI: https://trollkhach.com
Description: Mạng xã hội cộng đồng sáng tạo Việt Nam - Nơi dân Thiết kế, Marketing, UI/UX, Editor chia sẻ kinh nghiệm, kết nối và tìm việc.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.6
Requires PHP: 8.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: trollkhach
Domain Path: /languages
Tags: community, social-network, threads-like, creative, responsive, three-columns
*/

/* ============================================================
   TrollKhach Theme - Design Tokens + Reset + Base
   Tham chiếu: UI-DESIGN-SYSTEM.md
   ============================================================ */

/* ============================================================
   1. DESIGN TOKENS (CSS Custom Properties)
   ============================================================ */
:root {
    /* ----- Dub style core (near-monochrome + accent labels) ----- */
    --dub-paper:         #ffffff;
    --dub-ink:           #0a0a0a;
    --dub-carbon:        #171717;
    --dub-smoke-700:     #404040;
    --dub-smoke-600:     #525252;
    --dub-smoke-500:     #737373;
    --dub-smoke-400:     #a3a3a3;
    --dub-smoke-200:     #d4d4d4;
    --dub-smoke-100:     #e5e5e5;
    --dub-smoke-50:      #f5f5f5;

    --dub-accent-orange: #ea580c;
    --dub-accent-green:  #16a34a;
    --dub-accent-violet: #7c3aed;
    --dub-accent-blue:   #3b82f6;
    --dub-accent-mint:   #dcfce7;

    --dub-accent-orange-soft: rgba(234, 88, 12, 0.10);
    --dub-accent-green-soft:  rgba(22, 163, 74, 0.10);
    --dub-accent-violet-soft: rgba(124, 58, 237, 0.10);
    --dub-accent-blue-soft:   rgba(59, 130, 246, 0.10);

    /* ----- Primary/Neutral aliases (backward compatible) ----- */
    --color-primary-50:   #f8fafc;
    --color-primary-100:  #f1f5f9;
    --color-primary-200:  #e2e8f0;
    --color-primary-300:  #cbd5e1;
    --color-primary-400:  #94a3b8;
    --color-primary-500:  var(--dub-smoke-600);
    --color-primary-600:  var(--dub-carbon);
    --color-primary-700:  var(--dub-ink);
    --color-primary-800:  #000000;
    --color-primary-900:  #000000;

    --color-neutral-0:    var(--dub-paper);
    --color-neutral-25:   #fcfcfc;
    --color-neutral-50:   var(--dub-smoke-50);
    --color-neutral-100:  var(--dub-smoke-100);
    --color-neutral-200:  var(--dub-smoke-200);
    --color-neutral-300:  #c8c8c8;
    --color-neutral-400:  var(--dub-smoke-400);
    --color-neutral-500:  var(--dub-smoke-500);
    --color-neutral-600:  var(--dub-smoke-600);
    --color-neutral-700:  var(--dub-smoke-700);
    --color-neutral-800:  var(--dub-carbon);
    --color-neutral-900:  var(--dub-ink);
    --color-neutral-950:  #000000;

    /* ----- Semantic ----- */
    --color-success-50:   #f0fdf4;
    --color-success-100:  #dcfce7;
    --color-success-500:  #16a34a;
    --color-success-600:  #15803d;
    --color-success-700:  #166534;
    --color-warning-50:   #fff7ed;
    --color-warning-100:  #ffedd5;
    --color-warning-500:  #ea580c;
    --color-warning-600:  #c2410c;
    --color-warning-700:  #9a3412;
    --color-error-50:     #fef2f2;
    --color-error-100:    #fee2e2;
    --color-error-500:    #ef4444;
    --color-error-600:    #dc2626;
    --color-error-700:    #b91c1c;
    --color-info-50:      #eff6ff;
    --color-info-100:     #dbeafe;
    --color-info-500:     #3b82f6;
    --color-info-600:     #2563eb;
    --color-info-700:     #1d4ed8;

    /* ----- Brand categories ----- */
    --color-brand-thiet-ke:      var(--dub-accent-orange);
    --color-brand-marketing:     var(--dub-accent-green);
    --color-brand-uiux:          var(--dub-accent-violet);
    --color-brand-editor:        var(--dub-accent-blue);
    --color-brand-timviec:       #ca8a04;
    --color-brand-thiet-ke-bg:   var(--dub-accent-orange-soft);
    --color-brand-marketing-bg:  var(--dub-accent-green-soft);
    --color-brand-uiux-bg:       var(--dub-accent-violet-soft);
    --color-brand-editor-bg:     var(--dub-accent-blue-soft);
    --color-brand-timviec-bg:    rgba(202, 138, 4, 0.10);

    /* ----- Typography ----- */
    --font-sans:      'Inter', 'General Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    --font-mono:      'Geist Mono', 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
    --font-display:   'Satoshi', 'General Sans', 'Inter', var(--font-sans);
    --text-xs:        0.75rem;
    --text-sm:        0.875rem;
    --text-base:      1rem;
    --text-md:        1rem;
    --text-lg:        1.125rem;
    --text-xl:        1.5rem;
    --text-2xl:       1.875rem;
    --text-3xl:       2.25rem;
    --text-4xl:       3rem;
    --font-normal:    400;
    --font-medium:    500;
    --font-semibold:  600;
    --font-bold:      600;
    --leading-tight:  1.1;
    --leading-snug:   1.33;
    --leading-normal: 1.5;

    /* ----- Spacing (4px base) ----- */
    --space-0:   0;
    --space-0-5: 0.125rem;
    --space-1:   0.25rem;
    --space-1-5: 0.375rem;
    --space-2:   0.5rem;
    --space-2-5: 0.625rem;
    --space-3:   0.75rem;
    --space-3-5: 0.875rem;
    --space-4:   1rem;
    --space-5:   1.25rem;
    --space-6:   1.5rem;
    --space-8:   2rem;
    --space-10:  2.5rem;
    --space-12:  3rem;
    --space-16:  4rem;

    /* ----- Radius ----- */
    --radius-none:  0;
    --radius-xs:    0.125rem;
    --radius-sm:    0.25rem;
    --radius-md:    0.5rem;
    --radius-lg:    0.75rem;
    --radius-xl:    1rem;
    --radius-2xl:   1.25rem;
    --radius-full:  9999px;

    /* ----- Elevation (flat editorial) ----- */
    --shadow-xs:      0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm:      0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md:      0 4px 6px rgba(0, 0, 0, 0.10);
    --shadow-lg:      0 4px 6px rgba(0, 0, 0, 0.10);
    --shadow-xl:      0 8px 20px rgba(0, 0, 0, 0.10);
    --shadow-2xl:     0 12px 28px rgba(0, 0, 0, 0.14);
    --shadow-glow:    0 0 0 3px rgba(59, 130, 246, 0.24);
    --shadow-glow-error: 0 0 0 3px rgba(239, 68, 68, 0.24);
    --shadow-card-hover: 0 4px 6px rgba(0, 0, 0, 0.10);

    /* ----- Motion ----- */
    --transition-fast:   120ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base:   200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow:   300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 350ms cubic-bezier(0.34, 1.56, 0.64, 1);
    --duration-150: 150ms;
    --duration-200: 200ms;
    --duration-300: 300ms;
    --ease-out: cubic-bezier(0, 0, 0.2, 1);

    /* ----- Z-Index ----- */
    --z-10:  10;
    --z-20:  20;
    --z-30:  30;
    --z-40:  40;
    --z-50:  50;
    --z-max: 9999;

    /* ----- Layout ----- */
    --header-height:       56px;
    --sidebar-left-width:  250px;
    --sidebar-right-width: 300px;
    --feed-max-width:      600px;
    --feed-card-gap:       10px;
    --container-max:       1280px;
    --container-padding:   16px;
    --card-padding:        16px;
    --card-avatar-size:    44px;
    --avatar-xs:  24px;
    --avatar-sm:  32px;
    --avatar-md:  44px;
    --avatar-lg:  64px;
    --avatar-xl:  100px;

    /* ----- Breakpoints (tham chiếu) ----- */
    --bp-sm:  640px;
    --bp-md:  768px;
    --bp-lg:  1024px;
    --bp-xl:  1280px;

    /* ----- Sidebar ----- */
    --sidebar-bg:           var(--dub-paper);
    --sidebar-bg-hover:     var(--dub-smoke-50);
    --sidebar-bg-active:    #f0f0f0;
    --sidebar-text:         var(--dub-smoke-600);
    --sidebar-text-hover:   var(--dub-carbon);
    --sidebar-text-active:  var(--dub-ink);
    --sidebar-text-muted:   var(--dub-smoke-400);
    --sidebar-border:       var(--dub-smoke-100);

    /* ----- Page Background ----- */
    --page-bg:              var(--dub-paper);
}

/* ============================================================
   2. DARK MODE
   ============================================================ */
[data-theme="dark"] {
    --dub-paper:         #111111;
    --dub-ink:           #fafafa;
    --dub-carbon:        #ededed;
    --dub-smoke-700:     #d4d4d4;
    --dub-smoke-600:     #b5b5b5;
    --dub-smoke-500:     #9a9a9a;
    --dub-smoke-400:     #777777;
    --dub-smoke-200:     #3f3f3f;
    --dub-smoke-100:     #2c2c2c;
    --dub-smoke-50:      #1e1e1e;

    --color-neutral-0:   var(--dub-paper);
    --color-neutral-25:  #161616;
    --color-neutral-50:  var(--dub-smoke-50);
    --color-neutral-100: var(--dub-smoke-100);
    --color-neutral-200: var(--dub-smoke-200);
    --color-neutral-300: #4a4a4a;
    --color-neutral-400: var(--dub-smoke-400);
    --color-neutral-500: var(--dub-smoke-500);
    --color-neutral-600: var(--dub-smoke-600);
    --color-neutral-700: var(--dub-smoke-700);
    --color-neutral-800: var(--dub-carbon);
    --color-neutral-900: var(--dub-ink);
    --color-neutral-950: #ffffff;

    --sidebar-bg:        #111111;
    --sidebar-bg-hover:  #1a1a1a;
    --sidebar-bg-active: #202020;
}

/* ============================================================
   3. RESET
   ============================================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--color-neutral-700);
    background-color: var(--page-bg);
}

img, svg {
    max-width: 100%;
    height: auto;
    display: block;
}

svg {
    flex-shrink: 0;
}

a {
    color: var(--dub-accent-blue);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--dub-carbon);
}

ul, ol {
    list-style: none;
}

button, input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ============================================================
   3.1 ACCESSIBILITY BASELINE
   ============================================================ */
:focus-visible {
    outline: 2px solid var(--dub-accent-blue);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (prefers-contrast: more) {
    :root {
        --color-neutral-100: var(--dub-smoke-200);
        --color-neutral-400: var(--dub-smoke-500);
    }
}

/* ============================================================
   4. TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    line-height: var(--leading-tight);
    font-weight: var(--font-medium);
    letter-spacing: -0.02em;
    color: var(--color-neutral-900);
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }
h5 { font-size: var(--text-base); }
h6 { font-size: var(--text-sm); }

.heading-lg { font-size: clamp(2rem, 4vw, 3rem); line-height: 1; font-weight: var(--font-medium); }
.heading-md { font-size: clamp(1.625rem, 3vw, 2.25rem); line-height: 1.11; font-weight: var(--font-medium); }
.heading-sm { font-size: clamp(1.25rem, 2vw, 1.5rem); line-height: 1.33; font-weight: var(--font-medium); }

/* ============================================================
   5. UTILITY CLASSES
   ============================================================ */
.screen-reader-text {
    border: 0;
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
    word-wrap: normal !important;
}

.clearfix::after {
    content: '';
    display: table;
    clear: both;
}

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Icon sizing helpers */
.icon-sm { width: 16px; height: 16px; }
.icon-md { width: 20px; height: 20px; }
.icon-lg { width: 24px; height: 24px; }

/* ============================================================
   6. ANIMATION KEYFRAMES
   ============================================================ */
@keyframes fadeIn  { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeOut { from { opacity: 1; } to { opacity: 0; } }

@keyframes modalSlideUp {
    from { opacity: 0; transform: translateY(16px) scale(0.97); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes sheetSlideUp {
    from { transform: translateY(100%); }
    to   { transform: translateY(0); }
}

@keyframes drawerSlideIn {
    from { transform: translateX(100%); }
    to   { transform: translateX(0); }
}

@keyframes toastSlideIn {
    from { opacity: 0; transform: translateX(60px); }
    to   { opacity: 1; transform: translateX(0); }
}

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

@keyframes heartPop {
    0%   { transform: scale(1); }
    25%  { transform: scale(1.3); }
    50%  { transform: scale(0.9); }
    100% { transform: scale(1); }
}

@keyframes shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

.animate-fade-in  { animation: fadeIn var(--duration-200) var(--ease-out); }
.animate-slide-up { animation: modalSlideUp var(--duration-200) var(--ease-out); }
.animate-spin     { animation: spin 0.8s linear infinite; }

/* ============================================================
   7. DESIGN SYSTEM PRIMITIVES (Dub-inspired)
   ============================================================ */
.ds-surface {
    background: var(--color-neutral-0);
    border: 1px solid var(--color-neutral-100);
    border-radius: var(--radius-lg);
}

.ds-card {
    background: var(--color-neutral-0);
    border: 1px solid var(--color-neutral-100);
    border-radius: var(--radius-xl);
    padding: var(--space-4);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}

.ds-card:hover {
    border-color: var(--color-neutral-200);
    box-shadow: var(--shadow-card-hover);
}

.ds-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    min-height: 40px;
    padding: 0 var(--space-4);
    border-radius: var(--radius-full);
    border: 1px solid transparent;
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    line-height: 1;
    cursor: pointer;
    transition: transform var(--transition-fast), background-color var(--transition-base), border-color var(--transition-base), color var(--transition-base), box-shadow var(--transition-base);
}

.ds-btn:focus-visible {
    outline: none;
    box-shadow: var(--shadow-glow);
}

.ds-btn-primary {
    background: #000000;
    border-color: #000000;
    color: #ffffff;
}

.ds-btn-primary:hover {
    background: var(--dub-carbon);
    border-color: var(--dub-carbon);
}

.ds-btn-secondary {
    background: var(--color-neutral-0);
    border-color: var(--color-neutral-100);
    color: var(--color-neutral-800);
}

.ds-btn-secondary:hover {
    background: var(--color-neutral-50);
    border-color: var(--color-neutral-200);
}

.ds-btn-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--color-neutral-700);
}

.ds-btn-ghost:hover {
    background: var(--color-neutral-50);
    color: var(--color-neutral-900);
}

.ds-input,
.ds-textarea,
.ds-select {
    width: 100%;
    border: 1px solid var(--color-neutral-100);
    border-radius: var(--radius-md);
    background: var(--color-neutral-0);
    color: var(--color-neutral-900);
    padding: var(--space-2-5) var(--space-3);
    font-size: var(--text-sm);
    transition: border-color var(--transition-base), box-shadow var(--transition-base), background-color var(--transition-base);
}

.ds-textarea {
    min-height: 112px;
    resize: vertical;
}

.ds-input::placeholder,
.ds-textarea::placeholder {
    color: var(--color-neutral-400);
}

.ds-input:focus,
.ds-textarea:focus,
.ds-select:focus {
    outline: none;
    border-color: var(--dub-accent-blue);
    box-shadow: var(--shadow-glow);
}

.ds-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 24px;
    padding: 0 var(--space-2-5);
    border-radius: var(--radius-full);
    border: 1px solid var(--color-neutral-100);
    background: var(--color-neutral-50);
    color: var(--color-neutral-700);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    white-space: nowrap;
}

.ds-badge-orange {
    background: var(--dub-accent-orange-soft);
    border-color: rgba(234, 88, 12, 0.26);
    color: var(--dub-accent-orange);
}

.ds-badge-green {
    background: var(--dub-accent-green-soft);
    border-color: rgba(22, 163, 74, 0.26);
    color: var(--dub-accent-green);
}

.ds-badge-violet {
    background: var(--dub-accent-violet-soft);
    border-color: rgba(124, 58, 237, 0.26);
    color: var(--dub-accent-violet);
}

.ds-mono {
    font-family: var(--font-mono);
    letter-spacing: -0.01em;
}

.ds-shell {
    max-width: 1200px;
    margin-inline: auto;
    padding-inline: var(--space-4);
}

@media (max-width: 1024px) {
    .ds-shell {
        padding-inline: var(--space-3);
    }
}