/* ===========================
   QONVERTIR - Estilos Principales
   Design: Limpio, Familiar, Accesible
   =========================== */

/* Reset y Variables */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colores principales */
    --primary: #4F46E5;
    --primary-light: #818CF8;
    --primary-dark: #3730A3;
    
    /* Colores por herramienta */
    --qr-color: #10B981;
    --pdf-color: #EF4444;
    --compress-color: #06B6D4;
    --convert-color: #F59E0B;
    --password-color: #8B5CF6;
    --counter-color: #6366F1;
    
    /* Neutrales */
    --background: #FFFFFF;
    --surface: #F9FAFB;
    --border: #E5E7EB;
    --text-primary: #111827;
    --text-secondary: #6B7280;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

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

.header {
    background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
    border-bottom: 4px solid var(--primary);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    box-shadow: var(--shadow-md);
}

.logo-text h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.by-khabala {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
    margin-top: -5px;
}

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

.hero {
    background: linear-gradient(135deg, var(--surface) 0%, var(--background) 100%);
    padding: 60px 0;
    text-align: center;
}

.hero-title {
    font-size: 42px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 15px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===========================
   TOOLS SECTION
   =========================== */

.tools-section {
    padding: 60px 0;
    flex: 1;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 20px;
}

/* ===========================
   TOOL CARDS
   =========================== */

.tool-card {
    background: var(--background);
    border: 2px solid var(--border);
    border-radius: 16px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    position: relative;
    overflow: hidden;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    transition: all 0.3s ease;
}

/* Colores específicos por herramienta */
.qr-card::before { background: var(--qr-color); }
.pdf-card::before { background: var(--pdf-color); }
.compress-card::before { background: var(--compress-color); }
.convert-card::before { background: var(--convert-color); }
.password-card::before { background: var(--password-color); }
.counter-card::before { background: var(--counter-color); }

.qr-card:hover { border-color: var(--qr-color); }
.pdf-card:hover { border-color: var(--pdf-color); }
.compress-card:hover { border-color: var(--compress-color); }
.convert-card:hover { border-color: var(--convert-color); }
.password-card:hover { border-color: var(--password-color); }
.counter-card:hover { border-color: var(--counter-color); }

.tool-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.qr-card .tool-icon { background: rgba(16, 185, 129, 0.1); color: var(--qr-color); }
.pdf-card .tool-icon { background: rgba(239, 68, 68, 0.1); color: var(--pdf-color); }
.compress-card .tool-icon { background: rgba(6, 182, 212, 0.1); color: var(--compress-color); }
.convert-card .tool-icon { background: rgba(245, 158, 11, 0.1); color: var(--convert-color); }
.password-card .tool-icon { background: rgba(139, 92, 246, 0.1); color: var(--password-color); }
.counter-card .tool-icon { background: rgba(99, 102, 241, 0.1); color: var(--counter-color); }

.tool-card:hover .tool-icon {
    transform: scale(1.1);
}

.tool-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.tool-description {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 15px;
}

.tool-badge {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-top: 10px;
}

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

.footer {
    background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
    border-top: 4px solid var(--primary);
    padding: 30px 0;
    text-align: center;
    margin-top: auto;
}

.footer p {
    color: var(--text-secondary);
    font-size: 14px;
    margin: 5px 0;
}

.footer strong {
    color: var(--primary);
    font-weight: 600;
}

.footer-tagline {
    font-style: italic;
    color: var(--text-secondary);
    opacity: 0.7;
    margin-top: 5px;
}

/* ===========================
   RESPONSIVE - MOBILE FIRST
   =========================== */

/* Tablet - 768px a 1023px */
@media (max-width: 1023px) {
    .container {
        max-width: 100%;
        padding: 0 30px;
    }
    
    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

/* Mobile - hasta 767px */
@media (max-width: 767px) {
    /* Container */
    .container {
        padding: 0 20px;
    }
    
    /* Header */
    .header {
        padding: 15px 0;
    }
    
    .logo {
        gap: 12px;
    }
    
    .logo-icon {
        width: 45px;
        height: 45px;
        font-size: 22px;
    }
    
    .logo-text h1 {
        font-size: 20px;
    }
    
    .by-khabala {
        font-size: 11px;
    }
    
    /* Hero */
    .hero {
        padding: 50px 0 40px;
    }
    
    .hero-title {
        font-size: 32px;
        margin-bottom: 15px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    /* Tools Section */
    .tools-section {
        padding: 30px 0 40px;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    /* Tool Cards */
    .tool-card {
        padding: 30px 20px;
    }
    
    .tool-icon {
        width: 75px;
        height: 75px;
        margin-bottom: 15px;
    }
    
    .tool-icon svg {
        width: 40px;
        height: 40px;
    }
    
    .tool-title {
        font-size: 20px;
        margin-bottom: 8px;
    }
    
    .tool-description {
        font-size: 14px;
        margin-bottom: 12px;
    }
    
    .tool-badge {
        font-size: 12px;
        padding: 5px 14px;
    }
    
    /* Footer */
    .footer {
        padding: 25px 0;
    }
    
    .footer p {
        font-size: 13px;
    }
    
    .footer-tagline {
        font-size: 11px;
    }
}

/* Mobile Small - hasta 480px */
@media (max-width: 480px) {
    /* Container más compacto */
    .container {
        padding: 0 15px;
    }
    
    /* Header más pequeño */
    .header {
        padding: 12px 0;
    }
    
    .logo-icon {
        width: 40px;
        height: 40px;
        font-size: 20px;
    }
    
    .logo-text h1 {
        font-size: 18px;
    }
    
    .by-khabala {
        font-size: 10px;
    }
    
    /* Hero */
    .hero {
        padding: 40px 0 30px;
    }
    
    .hero-title {
        font-size: 26px;
        margin-bottom: 12px;
        line-height: 1.2;
    }
    
    .hero-subtitle {
        font-size: 15px;
    }
    
    /* Tools Section */
    .tools-section {
        padding: 25px 0 35px;
    }
    
    /* Tool Cards */
    .tool-card {
        padding: 25px 18px;
    }
    
    .tool-icon {
        width: 70px;
        height: 70px;
    }
    
    .tool-icon svg {
        width: 36px;
        height: 36px;
    }
    
    .tool-title {
        font-size: 19px;
    }
    
    .tool-description {
        font-size: 13px;
        line-height: 1.4;
    }
    
    /* Footer */
    .footer {
        padding: 20px 0;
    }
    
    .footer p {
        font-size: 12px;
    }
}

/* Extra Small Mobile - hasta 360px */
@media (max-width: 360px) {
    .hero-title {
        font-size: 24px;
    }
    
    .hero-subtitle {
        font-size: 14px;
    }
    
    .tool-card {
        padding: 20px 15px;
    }
    
    .tool-title {
        font-size: 18px;
    }
}

/* Landscape Mobile */
@media (max-height: 600px) and (orientation: landscape) {
    .hero {
        padding: 30px 0 25px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .tools-section {
        padding: 20px 0 30px;
    }
}

/* Touch-friendly improvements */
@media (pointer: coarse) {
    .tool-card {
        min-height: 44px; /* Tamaño mínimo touch */
    }
    
    .tool-card:active {
        transform: scale(0.98);
    }
}