/* Think Beyond - Premium Management Consultancy Styles */
/* Design System: Professional Navy + Blue CTA */

:root {
    --color-primary: #0F172A;
    --color-secondary: #334155;
    --color-cta: #0369A1;
    --color-cta-hover: #0284C7;
    --color-background: #F8FAFC;
    --color-text: #020617;
    --color-text-light: #64748B;
    --color-border: #E2E8F0;
    --color-white: #FFFFFF;
    --color-accent-gold: #D97706;
    
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Open Sans', sans-serif;
    
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --space-4xl: 96px;
    
    --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(0,0,0,0.1);
    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

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

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

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background: var(--color-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-primary);
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

button {
    cursor: pointer;
    font-family: inherit;
    border: none;
    background: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    transition: box-shadow var(--transition-base);
}

.header--scrolled {
    box-shadow: var(--shadow-md);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo__icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-cta));
    color: var(--color-white);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 14px;
}

.logo__text {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 18px;
    color: var(--color-primary);
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav__link {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-secondary);
    padding: var(--space-sm) 0;
    position: relative;
    cursor: pointer;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-cta);
    transition: width var(--transition-base);
}

.nav__link:hover::after,
.nav__link--active::after {
    width: 100%;
}

.nav__link:hover {
    color: var(--color-cta);
}

.nav__link--active {
    color: var(--color-cta);
}

.nav__link--cta {
    background: var(--color-cta);
    color: var(--color-white) !important;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-weight: 600;
}

.nav__link--cta::after {
    display: none;
}

.nav__link--cta:hover {
    background: var(--color-cta-hover);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-sm);
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition-base);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 12px 24px;
    font-family: var(--font-heading);
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn--primary {
    background: var(--color-cta);
    color: var(--color-white);
}

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

.btn--outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-border);
}

.btn--outline:hover {
    border-color: var(--color-cta);
    color: var(--color-cta);
}

.btn--lg {
    padding: 16px 32px;
    font-size: 16px;
}

.btn--sm {
    padding: 8px 16px;
    font-size: 14px;
}

/* ===== HERO ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(72px + var(--space-3xl)) 0 var(--space-3xl);
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-background) 0%, #E0F2FE 50%, var(--color-background) 100%);
    z-index: -2;
}

.hero__bg::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(ellipse, rgba(3, 105, 161, 0.08) 0%, transparent 70%);
    z-index: -1;
}

.hero__content {
    max-width: 800px;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: rgba(3, 105, 161, 0.1);
    color: var(--color-cta);
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: var(--space-lg);
}

.hero__badge svg {
    color: var(--color-accent-gold);
}

.hero__title {
    font-size: clamp(40px, 6vw, 64px);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    color: var(--color-primary);
}

.hero__title--accent {
    background: linear-gradient(135deg, var(--color-cta), #0EA5E9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: 18px;
    line-height: 1.7;
    color: var(--color-secondary);
    margin-bottom: var(--space-xl);
    max-width: 600px;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-bottom: var(--space-3xl);
}

.hero__stats {
    display: flex;
    gap: var(--space-3xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.hero__stat {
    display: flex;
    flex-direction: column;
}

.hero__stat-value {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 700;
    color: var(--color-primary);
}

.hero__stat-label {
    font-size: 14px;
    color: var(--color-text-light);
}

/* ===== SECTION HEADERS ===== */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-3xl);
}

.section-label {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-cta);
    margin-bottom: var(--space-md);
}

.section-title {
    font-size: clamp(28px, 4vw, 40px);
    margin-bottom: var(--space-md);
}

.section-subtitle {
    font-size: 17px;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ===== PROCESS SECTION ===== */
.process {
    padding: var(--space-4xl) 0;
    background: var(--color-white);
}

.process__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.process__card {
    background: var(--color-background);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    position: relative;
    transition: all var(--transition-base);
    border: 1px solid transparent;
}

.process__card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-border);
    background: var(--color-white);
}

.process__number {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    font-family: var(--font-heading);
    font-size: 48px;
    font-weight: 700;
    color: var(--color-border);
    line-height: 1;
}

.process__icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--color-cta), #0EA5E9);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    margin-bottom: var(--space-lg);
}

.process__title {
    font-size: 20px;
    margin-bottom: var(--space-sm);
}

.process__desc {
    font-size: 15px;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

.process__link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 14px;
    font-weight: 600;
    color: var(--color-cta);
    cursor: pointer;
}

.process__link:hover {
    gap: var(--space-sm);
}

/* ===== ABOUT PREVIEW ===== */
.about-preview {
    padding: var(--space-4xl) 0;
    background: var(--color-primary);
    color: var(--color-white);
}

.about-preview__inner {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.about-preview .section-label {
    color: rgba(255,255,255,0.7);
}

.about-preview .section-title {
    color: var(--color-white);
}

.about-preview__text {
    font-size: 16px;
    color: rgba(255,255,255,0.8);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
}

.about-preview__highlights {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.highlight {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 15px;
    font-weight: 500;
}

.highlight svg {
    color: #10B981;
    flex-shrink: 0;
}

.about-preview__visual {
    display: flex;
    justify-content: center;
}

.about-preview__card {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    text-align: center;
    border: 1px solid rgba(255,255,255,0.1);
}

.about-preview__quote {
    font-family: var(--font-heading);
    font-size: 24px;
    font-weight: 600;
    margin-bottom: var(--space-md);
    line-height: 1.4;
}

.about-preview__tagline {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
}

/* ===== TESTIMONIALS ===== */
.testimonials {
    padding: var(--space-4xl) 0;
    background: var(--color-background);
}

.testimonials__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.testimonial {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.testimonial:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.testimonial__stars {
    display: flex;
    gap: 2px;
    color: var(--color-accent-gold);
    margin-bottom: var(--space-lg);
}

.testimonial__text {
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-secondary);
    margin-bottom: var(--space-lg);
    font-style: italic;
}

.testimonial__author {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.testimonial__avatar {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--color-cta), #0EA5E9);
    color: var(--color-white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 600;
}

.testimonial__info {
    display: flex;
    flex-direction: column;
}

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

.testimonial__role {
    font-size: 13px;
    color: var(--color-text-light);
}

/* ===== INDUSTRIES PREVIEW ===== */
.industries-preview {
    padding: var(--space-4xl) 0;
    background: var(--color-white);
}

.industries__grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.industry-tag {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    padding: 12px 24px;
    border-radius: var(--radius-full);
    font-size: 15px;
    font-weight: 500;
    color: var(--color-secondary);
    transition: all var(--transition-base);
    cursor: default;
}

.industry-tag:hover {
    background: var(--color-cta);
    color: var(--color-white);
    border-color: var(--color-cta);
}

.industries__cta {
    text-align: center;
}

/* ===== CTA SECTION ===== */
.cta-section {
    padding: var(--space-3xl) 0;
    background: linear-gradient(135deg, var(--color-cta), #0284C7);
    color: var(--color-white);
}

.cta-section__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-xl);
}

.cta-section__title {
    font-size: 28px;
    color: var(--color-white);
    margin-bottom: var(--space-sm);
}

.cta-section__text {
    font-size: 16px;
    opacity: 0.9;
    max-width: 500px;
}

.cta-section__actions {
    display: flex;
    gap: var(--space-md);
    flex-shrink: 0;
}

.cta-section .btn--primary {
    background: var(--color-white);
    color: var(--color-cta);
}

.cta-section .btn--primary:hover {
    background: var(--color-background);
}

.cta-section .btn--outline {
    border-color: rgba(255,255,255,0.4);
    color: var(--color-white);
}

.cta-section .btn--outline:hover {
    border-color: var(--color-white);
    background: rgba(255,255,255,0.1);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--color-primary);
    color: rgba(255,255,255,0.8);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.logo--footer .logo__text {
    color: var(--color-white);
}

.footer__tagline {
    font-size: 14px;
    line-height: 1.7;
    margin-top: var(--space-md);
    max-width: 280px;
}

.footer__social {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    cursor: pointer;
}

.social-link:hover {
    background: var(--color-cta);
}

.footer__heading {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-white);
    margin-bottom: var(--space-lg);
}

.footer__links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer__links a {
    font-size: 14px;
    opacity: 0.8;
    transition: all var(--transition-base);
    cursor: pointer;
}

.footer__links a:hover {
    opacity: 1;
    color: var(--color-white);
}

.footer__contact p {
    display: flex;
    gap: var(--space-sm);
    font-size: 14px;
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

.footer__contact svg {
    flex-shrink: 0;
    margin-top: 3px;
    opacity: 0.6;
}

.footer__contact a:hover {
    color: var(--color-white);
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 13px;
}

.footer__legal {
    display: flex;
    gap: var(--space-lg);
}

.footer__legal a {
    opacity: 0.6;
    cursor: pointer;
}

.footer__legal a:hover {
    opacity: 1;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .process__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-preview__inner {
        grid-template-columns: 1fr;
    }
    
    .testimonials__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-md);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }
    
    .nav--open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle--active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle--active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle--active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero {
        min-height: auto;
        padding: calc(72px + var(--space-2xl)) 0 var(--space-2xl);
    }
    
    .hero__stats {
        flex-direction: column;
        gap: var(--space-lg);
    }
    
    .process__grid {
        grid-template-columns: 1fr;
    }
    
    .testimonials__grid {
        grid-template-columns: 1fr;
    }
    
    .cta-section__inner {
        flex-direction: column;
        text-align: center;
    }
    
    .cta-section__actions {
        flex-direction: column;
        width: 100%;
    }
    
    .cta-section__actions .btn {
        width: 100%;
    }
    
    .footer__grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .footer__bottom {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero__title {
        font-size: 32px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .btn--lg {
        padding: 14px 24px;
        font-size: 15px;
    }
}

/* ===== ANIMATIONS ===== */
@media (prefers-reduced-motion: no-preference) {
    .hero__badge,
    .hero__title,
    .hero__subtitle,
    .hero__actions,
    .hero__stats {
        animation: fadeInUp 0.6s ease backwards;
    }
    
    .hero__title { animation-delay: 0.1s; }
    .hero__subtitle { animation-delay: 0.2s; }
    .hero__actions { animation-delay: 0.3s; }
    .hero__stats { animation-delay: 0.4s; }
    
    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
}