/* ===================================
   INTUSBAU - Complete Responsive CSS
   Mobile-First Design
   =================================== */

/* RESET & BASE */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #000000;
    --secondary-color: #FFD700;
    --accent-color: #FFC700;
    --text-dark: #0f172a;
    --text-light: #64748b;
    --bg-light: #f8fafc;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--white);
    overflow-x: hidden;
}

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

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

a {
    text-decoration: none;
    color: inherit;
}

/* HEADER */
.header {
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    border-bottom: 3px solid var(--secondary-color);
    transition: all 0.3s ease;
}

.header.scrolled {
    background: rgba(0, 0, 0, 0.98);
    box-shadow: var(--shadow-lg);
}

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

.logo img {
    width: 130px;
    height: auto;
    transition: transform 0.3s ease;
}

.logo img:hover {
    transform: scale(1.05);
}

/* NAVIGATION */
.nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav a {
    color: var(--white);
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
    text-transform: uppercase;
}

.nav a:hover {
    color: var(--secondary-color);
}

.social-icons {
    display: flex;
    gap: 1rem;
}

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    transition: transform 0.3s ease;
}

.social-icons img {
    width: 24px;
    height: 24px;
    filter: brightness(0) invert(1);
    transition: filter 0.3s ease;
}

.social-icons a:hover {
    transform: translateY(-2px);
}

.social-icons a:hover img {
    filter: brightness(0) invert(1) sepia(1) saturate(5) hue-rotate(10deg);
}

/* HAMBURGER MENU */
.hamburger {
    display: none;
    font-size: 2rem;
    color: var(--white);
    cursor: pointer;
    background: none;
    border: none;
    padding: 0.5rem;
    line-height: 1;
}

/* HERO SECTION */
.hero-wrapper {
    margin-top: 80px;
}

.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), 
                url('../img/hero.jpg') center/cover no-repeat fixed;
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    padding: 80px 20px;
    position: relative;
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero-main {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 0.8s ease;
}

.hero-list {
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    margin-bottom: 1.5rem;
    font-weight: 400;
    color: var(--secondary-color);
    letter-spacing: 1px;
    animation: fadeInUp 1s ease;
}

.hero-promise {
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
    margin-bottom: 2.5rem;
    font-weight: 300;
    color: #e2e8f0;
    animation: fadeInUp 1.2s ease;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1.4s ease;
}

/* BUTTONS */
.btn {
    padding: 16px 40px;
    font-size: 1.1rem;
    font-weight: 700;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    display: inline-block;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-primary {
    background: var(--secondary-color);
    color: var(--primary-color);
    border: 3px solid var(--secondary-color);
}

.btn-primary:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(251, 191, 36, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 3px solid var(--white);
}

.btn-secondary:hover {
    background: var(--secondary-color);
    border-color: var(--secondary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(251, 191, 36, 0.3);
}

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

.section-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 800;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    text-align: center;
    color: var(--text-light);
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* CONTENT SECTIONS */
.content-section {
    background: var(--bg-light);
}

.content-section:nth-child(even) {
    background: var(--white);
}

/* CARDS/BOXES */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.card {
    background: var(--white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

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

.card-icon {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.card-text {
    color: var(--text-light);
    line-height: 1.8;
}

/* FOOTER */
.footer {
    background: #000000;
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-top {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--secondary-color);
}

.footer ul {
    list-style: none;
}

.footer ul li {
    margin-bottom: 0.8rem;
}

.footer a {
    color: #cbd5e1;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: var(--secondary-color);
}

.phone-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.8rem;
}

.footer-icon {
    width: 20px;
    height: 20px;
    filter: brightness(0) invert(1);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
    color: #94a3b8;
    font-size: 0.9rem;
}

.footer-bottom a {
    color: var(--secondary-color);
}

/* ANIMATIONS */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* MOBILE RESPONSIVE */
@media (max-width: 768px) {
    /* Hide desktop nav, show hamburger */
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(0, 0, 0, 0.98);
        padding: 2rem;
        box-shadow: var(--shadow-lg);
    }

    .nav.active {
        display: block;
    }

    .nav ul {
        flex-direction: column;
        gap: 1.5rem;
    }

    .hamburger {
        display: block;
    }

    /* Hero adjustments */
    .hero {
        min-height: 600px;
        padding: 60px 20px;
        background-attachment: scroll;
    }

    .hero-main {
        font-size: 2rem;
    }

    .hero-list {
        font-size: 1rem;
    }

    .hero-promise {
        font-size: 1.1rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
        max-width: 100%;
        padding: 14px 30px;
        font-size: 1rem;
    }

    /* Logo 50% smaller and centered on mobile */
    .header .container {
        justify-content: center;
        position: relative;
    }
    
    .logo {
        display: flex;
        justify-content: center;
        align-items: center;
    }
    
    .logo img {
        width: 25px;  /* 50% smaller than before (was 50px) */
        height: auto;
    }
    
    .hamburger {
        position: absolute;
        right: 20px;
        top: 50%;
        transform: translateY(-50%);
    }

    /* Sections */
    section {
        padding: 60px 0;
    }

    /* Cards single column */
    .cards-grid {
        grid-template-columns: 1fr;
    }

    /* Footer stack */
    .footer-top {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-main {
        font-size: 1.6rem;
    }

    .hero-list {
        font-size: 0.9rem;
    }

    .hero-promise {
        font-size: 1rem;
    }

    .btn {
        padding: 12px 24px;
        font-size: 0.95rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    section {
        padding: 40px 0;
    }
}

/* UTILITY CLASSES */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

.py-1 { padding-top: 1rem; padding-bottom: 1rem; }
.py-2 { padding-top: 2rem; padding-bottom: 2rem; }
.py-3 { padding-top: 3rem; padding-bottom: 3rem; }

/* WHATSAPP FLOATING BUTTON */
.whatsapp-float {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 30px;
    right: 30px;
    background-color: #25D366;
    color: #FFF;
    border-radius: 50px;
    text-align: center;
    font-size: 30px;
    box-shadow: 2px 2px 10px rgba(0, 0, 0, 0.3);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.whatsapp-float:hover {
    background-color: #20BA5A;
    transform: scale(1.1);
    box-shadow: 2px 2px 20px rgba(37, 211, 102, 0.5);
}

.whatsapp-float svg {
    width: 35px;
    height: 35px;
    fill: white;
}

@media (max-width: 768px) {
    .whatsapp-float {
        width: 55px;
        height: 55px;
        bottom: 20px;
        right: 20px;
        font-size: 28px;
    }
    
    .whatsapp-float svg {
        width: 32px;
        height: 32px;
    }
}