/* =====================================================
   GLOBAL STYLES & CSS VARIABLES
   ===================================================== */

:root {
    /* Colors */
    --bg-primary: #0f0f1e;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --accent-primary: #00d4ff;
    --accent-secondary: #ff006e;
    --accent-tertiary: #8338ec;
    --text-primary: #ffffff;
    --text-secondary: #b0b0c0;
    --border-color: #2a2a4e;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Typography */
    --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* =====================================================
   BASE STYLES
   ===================================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-tertiary) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* =====================================================
   HEADER STYLES
   ===================================================== */

.header {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
    border-bottom: 2px solid var(--border-color);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(0, 212, 255, 0.03) 50%, transparent 70%);
    pointer-events: none;
}

.header-content {
    position: relative;
    z-index: 1;
}

.header h1 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.header p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    font-weight: 300;
}

/* =====================================================
   MAIN CONTAINER
   ===================================================== */

.container {
    flex: 1;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    padding: var(--spacing-xl) var(--spacing-md);
}

/* =====================================================
   SEARCH CONTAINER
   ===================================================== */

.search-container {
    margin-bottom: var(--spacing-xl);
    display: flex;
    justify-content: center;
}

.search-bar {
    width: 100%;
    max-width: 500px;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    transition: var(--transition);
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.2);
}

.search-bar:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.3), inset 0 2px 10px rgba(0, 0, 0, 0.2);
}

.search-bar::placeholder {
    color: var(--text-secondary);
}

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

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

/* =====================================================
   APP CARD STYLES
   ===================================================== */

.app-card {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(0, 212, 255, 0.05) 50%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.app-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-primary);
    box-shadow: 0 12px 30px rgba(0, 212, 255, 0.2);
}

.app-card:hover::before {
    opacity: 1;
}

.app-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.app-number {
    font-size: var(--font-size-sm);
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.app-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.app-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    flex: 1;
    line-height: 1.5;
}

.app-skills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.skill-tag {
    font-size: var(--font-size-sm);
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(0, 212, 255, 0.3);
}

.app-button {
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #000;
    border: none;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
    text-align: center;
    position: relative;
    z-index: 1;
}

.app-button:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(0, 212, 255, 0.4);
}

.app-button:active {
    transform: scale(0.98);
}

/* =====================================================
   FOOTER STYLES
   ===================================================== */

.footer {
    background: var(--bg-secondary);
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    border-top: 2px solid var(--border-color);
    color: var(--text-secondary);
    margin-top: auto;
}

/* =====================================================
   EMPTY STATE
   ===================================================== */

.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

.empty-state h2 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

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

@media (max-width: 768px) {
    .header h1 {
        font-size: 1.5rem;
    }

    .header p {
        font-size: 1rem;
    }

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

    .container {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

    .header {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.25rem;
    }

    .header p {
        font-size: 0.875rem;
    }

    .search-bar {
        font-size: 0.875rem;
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .app-card {
        padding: var(--spacing-md);
    }

    .app-icon {
        font-size: 2rem;
    }
}