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

:root {
    --primary: #2a5653;
    --primary-light: #3d7a74;
    --accent: #b29659;
    --accent-hover: #9b7132;
    --text-dark: #1a202c;
    --text-medium: #4a5568;
    --text-light: #718096;
    --bg-light: #f7fafc;
    --bg-white: #ffffff;
    --border: #e2e8f0;
    --success: #38a169;
    --gradient-hero: linear-gradient(135deg, #2a5653 0%, #3d7a74 50%, #2a5653 100%);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
    --shadow-md: 0 4px 14px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.15);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.2);
    --radius: 12px;
    --radius-lg: 20px;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-dark);
    line-height: 1.7;
    overflow-x: hidden;
    background: var(--bg-white);
}

h1, h2, h3, h4 {
    font-family: 'Playfair Display', Georgia, serif;
    line-height: 1.2;
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 36px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    text-transform: none;
    letter-spacing: 0.3px;
}

.btn-primary {
    background: var(--accent);
    color: var(--primary);
    box-shadow: 0 4px 15px rgba(178, 150, 89, 0.4);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(178, 150, 89, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--bg-white);
    border: 2px solid rgba(255,255,255,0.5);
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.1);
    border-color: var(--bg-white);
    transform: translateY(-2px);
}

.btn-dark {
    background: var(--primary);
    color: var(--bg-white);
    box-shadow: 0 4px 15px rgba(42, 86, 83, 0.3);
}

.btn-dark:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(42, 86, 83, 0.4);
}

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(42, 86, 83, 0.98);
    backdrop-filter: blur(10px);
    padding: 12px 0;
    box-shadow: var(--shadow-md);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    height: 113px;
    padding: 4px 12px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.nav-logo:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--accent);
}

.nav-logo img {
    height: 100%;
    width: auto;
    border-radius: 6px;
    object-fit: cover;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
}

.nav-links a {
    color: rgba(255,255,255,0.85);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-cta {
    padding: 10px 24px !important;
    background: var(--accent);
    color: var(--primary) !important;
    border-radius: 50px;
    font-weight: 600 !important;
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    background: var(--accent-hover);
    color: var(--primary) !important;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.mobile-toggle span {
    width: 28px;
    height: 3px;
    background: var(--bg-white);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
}

.mobile-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
    padding: 120px 0 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-badge {
    display: inline-block;
    background: rgba(178, 150, 89, 0.2);
    color: var(--accent);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    color: var(--bg-white);
    margin-bottom: 24px;
    font-weight: 800;
}

.hero h1 span {
    color: var(--accent);
}

.hero p {
    font-size: clamp(1.05rem, 2vw, 1.25rem);
    color: rgba(255,255,255,0.8);
    margin-bottom: 40px;
    max-width: 650px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-decoration {
    position: absolute;
    right: -50px;
    top: 50%;
    transform: translateY(-50%);
    width: 500px;
    height: 500px;
    opacity: 0.08;
}

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

/* ===== SECTION STYLES ===== */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-label {
    display: inline-block;
    color: var(--accent);
    font-weight: 700;
    font-size: 0.85rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    color: var(--primary);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== ABOUT SECTION ===== */
.about {
    background: var(--bg-white);
}

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

.about-image {
    position: relative;
}

.about-image-placeholder {
    width: 100%;
    aspect-ratio: 4/5;
    background: var(--gradient-hero);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.about-image-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Ctext x='50' y='45' text-anchor='middle' font-size='40' fill='rgba(255,255,255,0.15)' font-family='serif'%3Eπ%3C/text%3E%3Ctext x='30' y='70' text-anchor='middle' font-size='25' fill='rgba(255,255,255,0.1)' font-family='serif'%3E∑%3C/text%3E%3Ctext x='70' y='75' text-anchor='middle' font-size='25' fill='rgba(255,255,255,0.1)' font-family='serif'%3E∫%3C/text%3E%3C/svg%3E");
}

.about-image-icon {
    font-size: 5rem;
    position: relative;
    z-index: 1;
}

.about-image-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-lg);
    position: relative;
    z-index: 1;
}

.hero-professor-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    opacity: 0.15;
}

.about-stats {
    position: absolute;
    bottom: -20px;
    left: 20px;
    right: 20px;
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    box-shadow: var(--shadow-lg);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-family: 'Playfair Display', serif;
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--primary);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.about-content h2 {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.about-content p {
    color: var(--text-medium);
    margin-bottom: 16px;
    font-size: 1.05rem;
}

.about-differentials {
    margin-top: 24px;
}

.about-differentials h3 {
    font-family: 'Inter', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
}

.differential-list {
    list-style: none;
}

.differential-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
    color: var(--text-medium);
    font-size: 0.95rem;
}

.differential-list li::before {
    content: '✓';
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 24px;
    background: rgba(56, 161, 105, 0.1);
    color: var(--success);
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.75rem;
}

/* ===== BELIEFS SECTION ===== */
.beliefs {
    background: var(--bg-light);
}

.beliefs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.belief-card {
    background: var(--bg-white);
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.belief-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: var(--accent);
    transition: height 0.3s ease;
}

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

.belief-card:hover::before {
    height: 100%;
}

.belief-icon {
    width: 60px;
    height: 60px;
    background: rgba(42, 86, 83, 0.08);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.belief-card h3 {
    font-family: 'Inter', sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}

.belief-card p {
    color: var(--text-medium);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ===== SERVICES / PLANS SECTION ===== */
.plans {
    background: var(--bg-white);
}

.plans-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 50px;
    color: var(--text-medium);
    font-size: 1.05rem;
}

.plans-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.plan-card {
    background: var(--bg-white);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px 35px;
    position: relative;
    transition: all 0.3s ease;
}

.plan-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.plan-card.featured {
    border-color: var(--accent);
    background: linear-gradient(135deg, rgba(178, 150, 89, 0.03), rgba(42, 86, 83, 0.02));
}

.plan-card.featured:hover {
    border-color: var(--accent-hover);
}

.plan-badge {
    position: absolute;
    top: -12px;
    right: 24px;
    background: var(--accent);
    color: var(--primary);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.plan-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.plan-card h3 {
    font-family: 'Inter', sans-serif;
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 8px;
}

.plan-description {
    color: var(--text-medium);
    font-size: 0.95rem;
    margin-bottom: 24px;
    line-height: 1.6;
}

.plan-features {
    list-style: none;
    margin-bottom: 28px;
}

.plan-features li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 12px;
    color: var(--text-medium);
    font-size: 0.9rem;
}

.plan-features li::before {
    content: '✓';
    color: var(--success);
    font-weight: 700;
    min-width: 18px;
}

.plan-price {
    display: flex;
    align-items: baseline;
    gap: 4px;
    margin-bottom: 8px;
}

.plan-price .currency {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary);
}

.plan-price .amount {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
}

.plan-price .price-original {
    font-size: 1.1rem;
    font-weight: 500;
    color: #1a202c;
    text-decoration: line-through;
    text-decoration-color: #e53e3e;
    text-decoration-thickness: 2px;
    margin-right: 8px;
}

.plan-price .price-discount {
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.plan-price .price-discount .amount {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
}

.plan-price .price-discount .currency {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary);
}

.plan-price .price-period {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-medium);
}

.plan-note {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 24px;
}

.plan-discount-note {
    font-size: 0.9rem;
    color: var(--accent);
    margin-bottom: 8px;
    font-weight: 500;
}

.plan-card .btn {
    width: 100%;
}

/* ===== DIFFERENTIALS SECTION ===== */
.differentials {
    background: var(--primary);
    color: var(--bg-white);
    position: relative;
    overflow: hidden;
}

.differentials::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.03' fill-rule='evenodd'%3E%3Cpath d='M0 40L40 0H20L0 20M40 40V20L20 40'/%3E%3C/g%3E%3C/svg%3E");
}

.differentials .container {
    position: relative;
    z-index: 1;
}

.differentials .section-label {
    color: var(--accent);
}

.differentials .section-title {
    color: var(--bg-white);
}

.differentials .section-subtitle {
    color: rgba(255,255,255,0.7);
}

.differentials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.diff-card {
    background: rgba(255,255,255,0.08);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-lg);
    padding: 35px 28px;
    transition: all 0.3s ease;
}

.diff-card:hover {
    background: rgba(255,255,255,0.12);
    transform: translateY(-5px);
}

.diff-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.diff-card h3 {
    font-family: 'Inter', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--accent);
}

.diff-card p {
    color: rgba(255,255,255,0.8);
    font-size: 0.95rem;
    line-height: 1.6;
}

.differentials-footer {
    text-align: center;
    margin-top: 50px;
    padding-top: 40px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.differentials-footer p {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.9);
    font-style: italic;
}

/* ===== APPROACH SECTION ===== */
.approach {
    background: var(--bg-light);
}

.approach-intro {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 50px;
    color: var(--text-medium);
    font-size: 1.05rem;
}

.approach-steps {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    position: relative;
}

.approach-steps::before {
    content: '';
    position: absolute;
    top: 45px;
    left: 10%;
    right: 10%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--primary));
    border-radius: 2px;
    z-index: 0;
}

.step-card {
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-number {
    width: 70px;
    height: 70px;
    background: var(--bg-white);
    border: 3px solid var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    box-shadow: var(--shadow-md);
}

.step-card h3 {
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.step-card p {
    color: var(--text-medium);
    font-size: 0.85rem;
    line-height: 1.5;
}

.approach-closing {
    text-align: center;
    margin-top: 50px;
    padding: 30px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.approach-closing p {
    color: var(--text-medium);
    font-size: 1.1rem;
    font-style: italic;
}

/* ===== CTA / SCHEDULING SECTION ===== */
.scheduling {
    background: var(--gradient-hero);
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.scheduling::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.scheduling .container {
    position: relative;
    z-index: 1;
}

.scheduling h2 {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    color: var(--bg-white);
    margin-bottom: 16px;
}

.scheduling p {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.8);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.scheduling .btn-primary {
    font-size: 1.1rem;
    padding: 18px 48px;
}

/* ===== FOOTER ===== */
.footer {
    background: #0d1b2a;
    color: rgba(255,255,255,0.7);
    padding: 60px 0 30px;
}

.footer-content {
    text-align: center;
}

.footer-logo {
    font-family: 'Playfair Display', serif;
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--bg-white);
    margin-bottom: 16px;
}

.footer-logo span {
    color: var(--accent);
}

.footer-tagline {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.6);
    margin-bottom: 8px;
}

.footer-description {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.4);
    max-width: 500px;
    margin: 0 auto 30px;
}

.footer-divider {
    height: 1px;
    background: rgba(255,255,255,0.1);
    margin: 30px 0;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.4);
}

/* ===== SCROLL TO TOP ===== */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: var(--bg-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--accent);
    color: var(--primary);
    transform: translateY(-3px);
}

/* ===== WHATSAPP FLOATING BUTTON ===== */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    left: 30px;
    width: 60px;
    height: 60px;
    background: #25D366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    z-index: 998;
    transition: all 0.3s ease;
    animation: whatsappPulse 2s infinite;
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(37, 211, 102, 0.6);
    animation: none;
}

.whatsapp-float svg {
    width: 32px;
    height: 32px;
    fill: white;
}

.whatsapp-tooltip {
    position: absolute;
    left: 70px;
    background: white;
    color: var(--text-dark);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    pointer-events: none;
}

.whatsapp-float:hover .whatsapp-tooltip {
    opacity: 1;
    visibility: visible;
}

@keyframes whatsappPulse {
    0% {
        box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    }
    50% {
        box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4), 0 0 0 10px rgba(37, 211, 102, 0.1);
    }
    100% {
        box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    }
}

/* ===== ANIMATIONS ===== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .about-grid {
        gap: 40px;
    }

    .plans-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }

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

    .approach-steps {
        grid-template-columns: repeat(3, 1fr);
    }

    .approach-steps::before {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav-logo {
        height: 45px;
        padding: 2px 6px;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--primary);
        flex-direction: column;
        padding: 80px 30px 30px;
        gap: 20px;
        transition: right 0.3s ease;
        box-shadow: -5px 0 30px rgba(0,0,0,0.3);
    }

    .nav-links.active {
        right: 0;
    }

    .mobile-toggle {
        display: flex;
    }

    .hero {
        padding: 100px 0 60px;
        min-height: auto;
    }

    .hero-badge {
        font-size: 0.65rem;
        padding: 5px 10px;
        margin-bottom: 12px;
        display: inline-block;
        letter-spacing: 0.5px;
    }

    .hero h1 {
        font-size: 1.5rem;
        line-height: 1.3;
        margin-bottom: 16px;
    }

    .hero p {
        font-size: 0.95rem;
        margin-bottom: 24px;
    }

    .hero-content {
        padding-top: 0;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-buttons .btn {
        width: 100%;
    }

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

    .about-image {
        order: -1;
    }

    .about-stats {
        position: relative;
        bottom: auto;
        left: auto;
        right: auto;
        margin-top: 20px;
    }

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

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

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

    .section {
        padding: 70px 0;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .approach-steps {
        grid-template-columns: 1fr;
    }

    .about-stats {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .plan-card {
        padding: 30px 24px;
    }
}