/* ===========================
   MAIN STYLESHEET
   =========================== */

:root {
    /* Color Palette */
    --color-primary: #0f172a;
    --color-primary-light: #1e293b;
    --color-primary-lighter: #334155;
    --color-accent: #06b6d4;
    --color-accent-hover: #0891b2;
    --color-accent-light: #cffafe;
    
    --color-admin: #ef4444;
    --color-admin-light: #fee2e2;
    --color-industrial: #10b981;
    --color-industrial-light: #d1fae5;
    --color-other: #8b5cf6;
    --color-other-light: #ede9fe;
    
    --color-bg: #f8fafc;
    --color-bg-secondary: #f1f5f9;
    --color-surface: #ffffff;
    --color-surface-secondary: #f8fafc;
    
    --color-text-primary: #0f172a;
    --color-text-secondary: #475569;
    --color-text-tertiary: #94a3b8;
    --color-text-inverse: #f1f5f9;
    
    --color-border: #e2e8f0;
    --color-border-dark: #cbd5e1;
    
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-info: #3b82f6;
    
    --color-shadow: rgba(15, 23, 42, 0.08);
    --color-shadow-lg: rgba(15, 23, 42, 0.12);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-3xl: 2rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-Index */
    --z-hidden: -1;
    --z-base: 0;
    --z-dropdown: 100;
    --z-sticky: 500;
    --z-fixed: 750;
    --z-modal: 1000;
}

/* Dark Mode */
html.dark {
    --color-bg: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-surface: #1e293b;
    --color-surface-secondary: #334155;
    
    --color-text-primary: #f1f5f9;
    --color-text-secondary: #cbd5e1;
    --color-text-tertiary: #94a3b8;
    --color-text-inverse: #0f172a;
    
    --color-border: #334155;
    --color-border-dark: #475569;
    
    --color-shadow: rgba(0, 0, 0, 0.2);
    --color-shadow-lg: rgba(0, 0, 0, 0.3);
}

/* ===========================
   RESET & DEFAULTS
   =========================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-family);
    font-size: var(--text-base);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg);
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* ===========================
   TYPOGRAPHY
   =========================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    margin-bottom: var(--space-lg);
}

h1 {
    font-size: var(--text-4xl);
}

h2 {
    font-size: var(--text-3xl);
}

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);
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

/* ===========================
   NAVBAR
   =========================== */

.navbar {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.8);
    transition: all var(--transition-base);
}

html.dark .navbar {
    background-color: rgba(30, 41, 59, 0.8);
}

.navbar-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-xl);
    position: relative;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    text-decoration: none;
    color: var(--color-primary);
    font-weight: var(--font-weight-bold);
    font-size: var(--text-xl);
    transition: opacity var(--transition-base);
}

html.dark .navbar-brand {
    color: var(--color-text-inverse);
}

.navbar-brand:hover {
    opacity: 0.8;
}

.logo-wrapper {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
    font-size: var(--text-lg);
    color: white;
}

.logo-icon {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-text {
    font-size: var(--text-lg);
    font-weight: var(--font-weight-bold);
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all var(--transition-base);
}

html.dark .logo-text {
    background: linear-gradient(135deg, var(--color-accent), #06d4e0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-nav {
    display: flex;
    gap: var(--space-xl);
    flex: 1;
    justify-content: center;
}

.nav-link {
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-medium);
    font-size: var(--text-sm);
    text-transform: capitalize;
    position: relative;
    transition: color var(--transition-base);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-accent);
}

.nav-link.active::after {
    width: 100%;
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    color: var(--color-text-primary);
}

.theme-toggle:hover {
    background-color: var(--color-border);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    transition: all var(--transition-base);
}

.sun-icon {
    display: block;
}

.moon-icon {
    display: none;
}

html.dark .sun-icon {
    display: none;
}

html.dark .moon-icon {
    display: block;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 24px;
    height: 24px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-text-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.navbar.menu-open .menu-toggle span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.navbar.menu-open .menu-toggle span:nth-child(2) {
    opacity: 0;
}

.navbar.menu-open .menu-toggle span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.navbar.menu-open .navbar-nav {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-lg) var(--space-xl);
    gap: var(--space-lg);
}

.navbar.menu-open .navbar-nav .nav-link::after {
    display: none;
}

/* ===========================
   MAIN CONTENT
   =========================== */

.main-content {
    flex: 1;
}

/* ===========================
   HERO SECTION
   =========================== */

.hero {
    max-width: 1440px;
    margin: 0 auto;
    padding: var(--space-4xl) var(--space-xl);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.hero-text {
    z-index: 1;
}

.hero-title {
    font-size: var(--text-5xl);
    font-weight: var(--font-weight-extrabold);
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    color: var(--color-primary);
}

html.dark .hero-title {
    color: var(--color-text-inverse);
}

.hero-description {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    margin-bottom: 0;
    line-height: 1.8;
}

.hero-visual {
    position: relative;
    height: 400px;
}

.hero-decoration {
    position: relative;
    width: 100%;
    height: 100%;
}

.deco-box {
    position: absolute;
    border-radius: var(--radius-2xl);
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
    opacity: 0.1;
}

.deco-1 {
    width: 200px;
    height: 200px;
    top: 0;
    right: 0;
    animation: float 6s ease-in-out infinite;
}

.deco-2 {
    width: 150px;
    height: 150px;
    bottom: 50px;
    left: 50px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    animation: float 8s ease-in-out infinite 1s;
}

.deco-3 {
    width: 100px;
    height: 100px;
    top: 100px;
    left: 0;
    background: linear-gradient(135deg, var(--color-accent-hover), var(--color-accent));
    animation: float 7s ease-in-out infinite 0.5s;
}

/* ===========================
   CONTROL PANEL (Search & Filter)
   =========================== */

.control-panel {
    max-width: 1440px;
    margin: var(--space-4xl) auto var(--space-3xl);
    padding: 0 var(--space-xl);
}

.search-container {
    display: grid;
    gap: var(--space-lg);
}

.search-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: var(--space-lg);
    width: 20px;
    height: 20px;
    color: var(--color-text-tertiary);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: var(--space-lg) var(--space-lg) var(--space-lg) 44px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-xl);
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    font-size: var(--text-base);
    font-family: var(--font-family);
    transition: all var(--transition-base);
    outline: none;
}

.search-input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-light);
}

.search-input::placeholder {
    color: var(--color-text-tertiary);
}

.filter-group {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.filter-btn {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    border: 2px solid var(--color-border);
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    border-radius: var(--radius-full);
    font-weight: var(--font-weight-medium);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.filter-btn:hover {
    border-color: var(--color-accent);
    background-color: var(--color-accent-light);
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
    color: white;
    border-color: transparent;
}

.filter-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    background-color: currentColor;
    transition: all var(--transition-base);
}

.filter-btn.active .filter-dot {
    background-color: white;
}

.results-info {
    margin-top: var(--space-lg);
    text-align: right;
}

.results-count {
    color: var(--color-text-tertiary);
    font-size: var(--text-sm);
    font-weight: var(--font-weight-medium);
}

/* ===========================
   NO RESULTS
   =========================== */

.no-results {
    max-width: 1440px;
    margin: var(--space-4xl) auto;
    padding: var(--space-4xl) var(--space-xl);
    text-align: center;
}

.no-results-content {
    max-width: 400px;
    margin: 0 auto;
}

.no-results svg {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-xl);
    opacity: 0.2;
    color: var(--color-text-primary);
}

.no-results h3 {
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
}

.no-results p {
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

.no-results.hidden {
    display: none;
}

/* ===========================
   APPS GRID
   =========================== */

.apps-grid {
    max-width: 1440px;
    margin: var(--space-3xl) auto;
    padding: 0 var(--space-xl);
}

.apps-category {
    margin-bottom: var(--space-4xl);
    transition: opacity var(--transition-base);
}

.apps-category.hidden {
    display: none;
}

.category-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
    padding-bottom: var(--space-lg);
    border-bottom: 2px solid var(--color-border);
}

.category-title {
    font-size: var(--text-2xl);
    font-weight: var(--font-weight-bold);
    margin: 0;
    color: var(--color-text-primary);
}

.category-badge {
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: var(--font-weight-bold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.category-badge.admin {
    background-color: var(--color-admin-light);
    color: var(--color-admin);
}

.category-badge.industrial {
    background-color: var(--color-industrial-light);
    color: var(--color-industrial);
}

.category-badge.other {
    background-color: var(--color-other-light);
    color: var(--color-other);
}

.apps-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
}

/* ===========================
   RESPONSIVE
   =========================== */

@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    .hero-visual {
        height: 300px;
    }

    .navbar-nav {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .apps-container {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }
}

@media (max-width: 768px) {
    :root {
        --text-5xl: 2.25rem;
        --text-4xl: 1.875rem;
        --text-3xl: 1.5rem;
        --space-4xl: 3rem;
        --space-3xl: 2rem;
    }

    .navbar-container {
        padding: var(--space-md) var(--space-lg);
        gap: var(--space-md);
    }

    .hero {
        padding: var(--space-3xl) var(--space-md);
    }

    .hero-title {
        font-size: var(--text-3xl);
    }

    .hero-description {
        font-size: var(--text-base);
    }

    .control-panel {
        padding: 0 var(--space-md);
        margin: var(--space-2xl) auto;
    }

    .search-wrapper,
    .filter-group {
        margin-bottom: var(--space-md);
    }

    .filter-group {
        gap: var(--space-sm);
    }

    .filter-btn {
        padding: var(--space-md) var(--space-md);
        font-size: var(--text-xs);
    }

    .apps-container {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: var(--space-md);
    }

    .apps-grid {
        padding: 0 var(--space-md);
    }
}

@media (max-width: 480px) {
    .navbar-brand {
        gap: var(--space-sm);
        font-size: var(--text-lg);
    }

    .logo-wrapper {
        width: 32px;
        height: 32px;
    }

    .hero {
        padding: var(--space-2xl) var(--space-md);
    }

    .hero-title {
        font-size: var(--text-2xl);
    }

    .hero-description {
        font-size: var(--text-sm);
    }

    .hero-visual {
        height: 200px;
    }

    .deco-1, .deco-2, .deco-3 {
        opacity: 0.05;
    }

    .filter-group {
        flex-direction: column;
    }

    .filter-btn {
        width: 100%;
        justify-content: center;
    }

    .apps-container {
        grid-template-columns: 1fr;
    }

    .category-header {
        flex-direction: column;
        align-items: flex-start;
    }
}