/* ============================================
   ULISES CECA PORTFOLIO - PHP 8.1 VERSION
   Unified CSS for Portfolio + Interactive Demos
   ============================================ */

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

:root {
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --secondary-color: #10b981;
    --accent-color: #8b5cf6;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-dark: #0a0a0a;
    --border-color: #e2e8f0;
    --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);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    padding: 1rem 0;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.language-selector {
    display: flex;
    gap: 0.5rem;
    background: var(--bg-tertiary);
    padding: 0.25rem;
    border-radius: 8px;
}

.lang-btn {
    padding: 0.5rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.lang-btn.active {
    background: var(--bg-primary);
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.lang-btn:hover:not(.active) {
    color: var(--text-primary);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
    min-height: 600px;
    display: flex;
    align-items: center;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    opacity: 0.05;
    z-index: -1;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.profile-image {
    width: 100%;
    max-width: 400px;
    aspect-ratio: 1;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    padding: 8px;
    margin: 0 auto;
}

.profile-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    background: white;
}

/* ============================================
   BUTTONS
   ============================================ */
.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    text-align: center;
}

.cta-button.primary {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-md);
}

.cta-button.primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.cta-button.secondary {
    background: var(--bg-tertiary);
    color: var(--primary-color);
    border: 2px solid var(--border-color);
}

.cta-button.secondary:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* ============================================
   SECTIONS
   ============================================ */
section {
    padding: 80px 0;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

/* ============================================
   SERVICIOS
   ============================================ */
.servicios {
    background: var(--bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.card-image {
    width: 100%;
    height: 200px;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.card-image svg {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.card-content {
    padding: 2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.card-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
    flex: 1;
}

/* ============================================
   STACK TECNOLÓGICO
   ============================================ */
.stack {
    background: white;
}

.stack-description {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto 3rem;
    line-height: 1.8;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.tech-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.tech-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-icon svg {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.tech-item span {
    font-weight: 500;
    color: var(--text-primary);
    text-align: center;
}

/* ============================================
   INTERACTIVE DEMOS
   ============================================ */
.demos {
    background: var(--bg-secondary);
}

.demos-description {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 3rem;
    line-height: 1.8;
}

.demo-card {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-md);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.demo-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.demo-title {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.demo-description {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.demo-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.demo-score {
    color: var(--text-secondary);
    font-weight: 500;
}

.demo-canvas-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.demo-canvas-wrapper canvas {
    background: var(--bg-dark);
    border-radius: 12px;
    max-width: 100%;
    height: auto;
    display: block;
}

.demo-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.6);
    border-radius: 12px;
    color: rgba(255, 255, 255, 0.6);
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.demo-overlay.hidden {
    opacity: 0;
}

.audio-presets {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.preset-btn {
    padding: 0.5rem 1rem;
    border: 2px solid var(--border-color);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: 20px;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.preset-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.preset-btn:hover:not(.active) {
    background: white;
    color: var(--text-primary);
}

/* ============================================
   WHY ME
   ============================================ */
.why-me {
    background: var(--bg-secondary);
}

.why-content {
    max-width: 900px;
    margin: 0 auto;
}

.why-description {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    line-height: 1.8;
}

.why-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.feature {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.feature-icon {
    width: 40px;
    height: 40px;
    background: var(--secondary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.feature span {
    font-weight: 500;
    color: var(--text-primary);
}

/* ============================================
   CONTACT
   ============================================ */
.contact {
    background: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 4rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-message {
    padding: 1rem;
    border-radius: 8px;
    margin-top: 1rem;
    display: none;
}

.form-message.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--secondary-color);
    border: 1px solid var(--secondary-color);
    display: block;
}

.form-message.error {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid #ef4444;
    display: block;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: 12px;
}

.info-item .icon {
    width: 24px;
    height: 24px;
    color: var(--primary-color);
    flex-shrink: 0;
}

.info-item a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    white-space: nowrap;
}

.info-item a:hover {
    text-decoration: underline;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.footer p {
    color: rgba(255, 255, 255, 0.7);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes wave {
    0%, 100% {
        height: 0.5rem;
    }
    50% {
        height: 1.5rem;
    }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-text {
        order: 2;
        text-align: center;
    }

    .hero-image {
        order: 1;
    }

    .profile-image {
        max-width: 300px;
    }

    .demo-card {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 100px 0 60px;
        min-height: auto;
    }

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

    .tech-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: 1rem;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .why-features {
        grid-template-columns: 1fr;
    }

    section {
        padding: 60px 0;
    }

    .demo-card {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero {
        padding: 140px 0 40px;
    }

    .profile-image {
        max-width: 250px;
    }

    .card-content {
        padding: 1.5rem;
    }

    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .cta-button {
        width: 100%;
    }

    .demo-canvas-wrapper canvas {
        width: 100%;
    }
}