/*
Theme Name: Training HRD Forum
Theme URI: https://training.hrd-forum.com/
Author: HRD Forum Architecture Team
Author URI: https://hrd-forum.com/
Description: Ultra-premium, SEO-first, zero-plugin WordPress theme for executive learning & capability development platform.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 8.0
License: Proprietary
License URI: https://hrd-forum.com/terms
Text Domain: hrdforum-training
Domain Path: /languages
*/

/* ==========================================================================
   1. CSS VARIABLES / DESIGN TOKENS
   ========================================================================== */
:root {
    /* Color Palette */
    --color-primary: #0A192F;          /* Deep Navy */
    --color-primary-dark: #020C1B;     /* Ultra Deep Navy */
    --color-primary-light: #172A45;    /* Navy Surface / Card */
    --color-secondary: #0052CC;        /* Corporate Blue */
    --color-secondary-hover: #0747A6;  /* Darker Blue */
    --color-accent: #C5A059;           /* Restrained Premium Gold */
    --color-accent-hover: #B38E47;     /* Gold Hover */
    --color-accent-soft: rgba(197, 160, 89, 0.12); /* Gold Tint */

    /* Neutrals & Surfaces */
    --color-background: #F8FAFC;       /* Off-white page background */
    --color-surface: #FFFFFF;          /* Pure white card surface */
    --color-surface-muted: #F1F5F9;    /* Light gray panel */
    --color-text: #0F172A;             /* Slate 900 primary text */
    --color-text-muted: #475569;       /* Slate 600 secondary text */
    --color-text-light: #94A3B8;       /* Slate 400 tertiary text */
    --color-border: #E2E8F0;           /* Slate 200 border */
    --color-border-dark: #CBD5E1;      /* Slate 300 border */

    /* Semantic States */
    --color-success: #059669;
    --color-warning: #D97706;
    --color-error: #DC2626;

    /* Typography Hierarchy */
    --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

    /* Modular Fluid Typography */
    --text-xs: clamp(0.75rem, 0.70rem + 0.25vw, 0.8125rem);
    --text-sm: clamp(0.875rem, 0.825rem + 0.25vw, 0.9375rem);
    --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
    --text-lg: clamp(1.125rem, 1.05rem + 0.35vw, 1.25rem);
    --text-xl: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
    --text-2xl: clamp(1.5rem, 1.35rem + 0.75vw, 1.875rem);
    --text-3xl: clamp(1.875rem, 1.65rem + 1.15vw, 2.375rem);
    --text-4xl: clamp(2.25rem, 1.95rem + 1.5vw, 3rem);

    /* Layout Spacing */
    --space-2xs: 0.25rem;
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4.5rem;
    --space-4xl: 6rem;

    /* Structural Max-Widths */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1240px;
    --container-wide: 1400px;

    /* Elevations & Shadows */
    --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.03);
    --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.04);

    /* Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Header height */
    --header-height: 76px;
}

/* ==========================================================================
   2. MODERN CSS RESET & BASE STYLES
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 100%;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    tab-size: 4;
}

@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;
        scroll-behavior: auto !important;
    }
}

body {
    background-color: var(--color-background);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.65;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Accessible focus styling */
:focus-visible {
    outline: 2px solid var(--color-secondary);
    outline-offset: 2px;
}

/* Skip link for accessibility (WCAG AA) */
.skip-link {
    position: absolute;
    top: -100px;
    left: var(--space-md);
    background: var(--color-primary);
    color: var(--color-surface);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-sm);
    z-index: 9999;
    font-size: var(--text-sm);
    font-weight: 600;
    text-decoration: none;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--space-md);
}

/* Media handling */
img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

input, button, textarea, select {
    font: inherit;
    color: inherit;
}

button {
    cursor: pointer;
    background: none;
    border: none;
}

a {
    color: var(--color-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-secondary-hover);
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-primary);
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.015em;
    margin-bottom: var(--space-sm);
}

h1 { font-size: var(--text-4xl); line-height: 1.15; }
h2 { font-size: var(--text-3xl); line-height: 1.2; }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
    margin-bottom: var(--space-md);
}

p:last-child {
    margin-bottom: 0;
}

/* Layout container */
.container {
    width: 100%;
    max-width: var(--container-xl);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-md);
    padding-right: var(--space-md);
}

@media (min-width: 768px) {
    .container {
        padding-left: var(--space-xl);
        padding-right: var(--space-xl);
    }
}