/*
Theme Name: Astra Ultra Pro
Theme URI: https://example.com/astra-ultra-pro
Author: UltraThemes Engineering
Author URI: https://example.com
Description: Next-generation, high-performance, modular WordPress theme built for business flexibility. Features deep typography control, header/footer widgets, native auto/light/dark modes, and Elementor visual engine optimization.
Version: 2.0.0
Requires at least: 6.0
Tested up to: 6.5
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: astra-ultra-pro
*/

:root {
    --au-font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --au-font-headings: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --au-font-size-base: 16px;
    --au-line-height-base: 1.6;
    --au-container-width: 1240px;
    --au-radius: 8px;
    --au-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);

    /* Light Theme (Default) */
    --au-color-primary: #0066cc;
    --au-color-primary-hover: #0052a3;
    --au-color-bg: #ffffff;
    --au-color-surface: #f8fafc;
    --au-color-text: #334155;
    --au-color-headings: #0f172a;
    --au-color-border: #e2e8f0;
    --au-header-bg: #ffffff;
    --au-footer-bg: #0f172a;
    --au-footer-text: #94a3b8;
}

[data-theme="dark"] {
    --au-color-primary: #38bdf8;
    --au-color-primary-hover: #0ea5e9;
    --au-color-bg: #0b0f19;
    --au-color-surface: #131b2e;
    --au-color-text: #94a3b8;
    --au-color-headings: #f1f5f9;
    --au-color-border: #1e293b;
    --au-header-bg: #0b0f19;
    --au-footer-bg: #070a12;
    --au-footer-text: #64748b;
}

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

html {
    font-size: var(--au-font-size-base);
    text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: var(--au-font-main);
    line-height: var(--au-line-height-base);
    background-color: var(--au-color-bg);
    color: var(--au-color-text);
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    transition: background-color var(--au-transition), color var(--au-transition);
}

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

a {
    color: var(--au-color-primary);
    text-decoration: none;
    transition: color var(--au-transition);
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--au-font-headings);
    color: var(--au-color-headings);
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 0.8rem;
}

/* Layout Utilities */
.au-container {
    width: 100%;
    max-width: var(--au-container-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

.au-container-fluid {
    width: 100%;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

/* Header & Navigation */
.site-header {
    background-color: var(--au-header-bg);
    border-bottom: 1px solid var(--au-color-border);
    position: relative;
    z-index: 1000;
    transition: background-color var(--au-transition), border-color var(--au-transition);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 75px;
    gap: 1.5rem;
}

.site-branding .site-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin: 0;
    letter-spacing: -0.02em;
}

.site-branding .site-title a {
    color: var(--au-color-headings);
}

/* Nav Menu (Desktop) */
.main-navigation {
    display: flex;
    align-items: center;
}

.main-navigation ul {
    display: flex;
    list-style: none;
    gap: 1.75rem;
}

.main-navigation a {
    font-weight: 500;
    color: var(--au-color-text);
    font-size: 0.95rem;
}

.main-navigation a:hover {
    color: var(--au-color-primary);
}

/* Header Action Controls */
.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Dark Mode Switcher Dropdown */
.theme-mode-selector {
    position: relative;
    display: inline-flex;
    align-items: center;
}

.theme-mode-selector select {
    appearance: none;
    -webkit-appearance: none;
    background-color: var(--au-color-surface);
    color: var(--au-color-text);
    border: 1px solid var(--au-color-border);
    border-radius: var(--au-radius);
    padding: 0.4rem 1.8rem 0.4rem 0.75rem;
    font-size: 0.85rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    outline: none;
    transition: all var(--au-transition);
}

.theme-mode-selector::after {
    content: "▼";
    font-size: 0.6rem;
    color: var(--au-color-text);
    position: absolute;
    right: 0.65rem;
    pointer-events: none;
}

/* Mobile Hamburger Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 28px;
    height: 22px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.mobile-menu-toggle span {
    width: 100%;
    height: 2px;
    background: var(--au-color-headings);
    border-radius: 2px;
    transition: all var(--au-transition);
}

/* Main Site Content */
.site-content {
    padding: 3.5rem 0;
    min-height: 70vh;
}

.site-content.is-fullwidth-layout {
    padding: 0;
    max-width: 100%;
}

/* Card & Typography Styles */
.post-card {
    background: var(--au-color-surface);
    border: 1px solid var(--au-color-border);
    border-radius: var(--au-radius);
    padding: 2.5rem;
    margin-bottom: 2rem;
    transition: border-color var(--au-transition);
}

.post-card .entry-meta {
    font-size: 0.875rem;
    color: var(--au-color-text);
    opacity: 0.8;
    margin-bottom: 1.25rem;
}

/* Footer Architecture */
.site-footer {
    background-color: var(--au-footer-bg);
    color: var(--au-footer-text);
    border-top: 1px solid var(--au-color-border);
}

.footer-widgets {
    padding: 4.5rem 0 3rem;
}

.footer-widgets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2.5rem;
}

.footer-widget-column .widget-title {
    color: #ffffff;
    font-size: 1.1rem;
    margin-bottom: 1.25rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 1.75rem 0;
    text-align: center;
    font-size: 0.875rem;
}

/* Tablet & Mobile Responsiveness Breakpoints */
@media (max-width: 992px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .main-navigation {
        display: none;
        position: absolute;
        top: 75px;
        left: 0;
        width: 100%;
        background-color: var(--au-header-bg);
        border-bottom: 1px solid var(--au-color-border);
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        padding: 1.5rem;
    }

    .main-navigation.is-active {
        display: block;
    }

    .main-navigation ul {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 640px) {
    .header-inner {
        height: 65px;
    }

    .site-branding .site-title {
        font-size: 1.25rem;
    }

    .post-card {
        padding: 1.5rem;
    }

    .site-content {
        padding: 2rem 0;
    }
}