/* ==========================================================================
   Mosaic Accounting & Taxation - Styles
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
    /* Colors */
    --color-navy: #2C3E50;
    --color-teal-dark: #2D7A7A;
    --color-teal: #3D9A9A;
    --color-teal-light: #5CBFB3;
    --color-teal-pale: #E8F5F3;
    --color-white: #FFFFFF;
    --color-gray-light: #F8F9FA;
    --color-gray: #666666;
    --color-footer: #1a252f;
    --color-whatsapp: #25D366;

    /* Typography */
    --font-family: 'Montserrat', sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-section: 5rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 10px;
    --radius-lg: 15px;
    --radius-full: 50px;
    --radius-circle: 50%;

    /* Shadows */
    --shadow-sm: 0 2px 10px rgba(0,0,0,0.05);
    --shadow-md: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.1);
    --shadow-xl: 0 10px 40px rgba(0,0,0,0.1);

    /* Transitions */
    --transition-fast: 0.3s ease;

    /* Layout */
    --max-width: 1200px;
    --max-width-narrow: 900px;
    --max-width-form: 500px;
}

/* --------------------------------------------------------------------------
   Base Styles
   -------------------------------------------------------------------------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    color: var(--color-navy);
    line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 5%;
}

.container--narrow {
    max-width: var(--max-width-narrow);
}

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

/* --------------------------------------------------------------------------
   Components: Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-white);
    color: var(--color-teal-dark);
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

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

/* --------------------------------------------------------------------------
   Components: Section Title
   -------------------------------------------------------------------------- */
.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title h2 {
    font-size: 2rem;
    color: var(--color-navy);
    margin-bottom: var(--spacing-xs);
}

.section-title--light h2 {
    color: var(--color-white);
}

.section-title__underline {
    width: 60px;
    height: 4px;
    background: var(--color-teal);
    margin: 0 auto;
}

/* --------------------------------------------------------------------------
   Components: Cards
   -------------------------------------------------------------------------- */
.card {
    background: var(--color-gray-light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    text-align: center;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.card--white {
    background: var(--color-white);
    padding: var(--spacing-lg) var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.card__icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--color-teal-dark), var(--color-teal-light));
    border-radius: var(--radius-circle);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 1.8rem;
}

.card__title {
    margin-bottom: var(--spacing-sm);
    color: var(--color-navy);
}

.card__text {
    color: var(--color-gray);
    font-size: 0.95rem;
}

.card__bio {
    text-align: left;
    font-size: 0.9rem;
    color: #555;
    line-height: 1.7;
    margin-top: var(--spacing-sm);
}

/* --------------------------------------------------------------------------
   Components: Industry Tags
   -------------------------------------------------------------------------- */
.industries-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
    max-width: var(--max-width);
    margin: 0 auto;
}

.industry-tag {
    background: var(--color-white);
    color: var(--color-navy);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-weight: var(--font-weight-medium);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.industry-tag:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    background: var(--color-teal);
    color: var(--color-white);
}

/* --------------------------------------------------------------------------
   Components: Credentials
   -------------------------------------------------------------------------- */
.credentials {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md) 0;
    border-top: 1px solid #eee;
    border-bottom: 1px solid #eee;
}

.credentials__item {
    font-size: 0.9rem;
}

.credentials__item strong {
    color: var(--color-teal-dark);
}

/* --------------------------------------------------------------------------
   Layout: Header
   -------------------------------------------------------------------------- */
.header {
    background: var(--color-white);
    padding: var(--spacing-sm) 5%;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-md);
}

.header__content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header__logo {
    text-decoration: none;
}

.header__logo img {
    height: 60px;
    transition: opacity var(--transition-fast);
}

.header__logo:hover img {
    opacity: 0.8;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav a {
    text-decoration: none;
    color: var(--color-navy);
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-fast);
}

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

/* --------------------------------------------------------------------------
   Layout: Hero
   -------------------------------------------------------------------------- */
.hero {
    background: linear-gradient(135deg, var(--color-teal-dark) 0%, var(--color-teal) 100%);
    padding: 10rem 5% 6rem;
    text-align: center;
    color: var(--color-white);
}

.hero__title {
    font-size: 2.8rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-sm);
}

.hero__subtitle {
    font-size: 1.2rem;
    font-weight: var(--font-weight-light);
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
}

/* --------------------------------------------------------------------------
   Layout: Sections
   -------------------------------------------------------------------------- */
.section {
    padding: var(--spacing-section) 5%;
}

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

.section--pale {
    background: var(--color-teal-pale);
}

.section--gray {
    background: var(--color-gray-light);
}

.section--dark {
    background: var(--color-navy);
    color: var(--color-white);
}

/* --------------------------------------------------------------------------
   Layout: Grids
   -------------------------------------------------------------------------- */
.grid {
    display: grid;
    gap: var(--spacing-lg);
    max-width: var(--max-width);
    margin: 0 auto;
}

.grid--services {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid--team {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    max-width: 1000px;
    margin-top: var(--spacing-lg);
}

/* --------------------------------------------------------------------------
   Section: About - Professional Logos
   -------------------------------------------------------------------------- */
.professional-logos {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid #ddd;
}

.professional-logos img {
    height: 60px;
    opacity: 0.9;
    transition: opacity var(--transition-fast);
}

.professional-logos img:hover {
    opacity: 1;
}

/* --------------------------------------------------------------------------
   Section: FAQ
   -------------------------------------------------------------------------- */
.faq-container {
    max-width: var(--max-width-narrow);
    margin: 0 auto;
}

.faq-item {
    background: var(--color-white);
    margin-bottom: var(--spacing-sm);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.faq-question {
    padding: var(--spacing-md);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: var(--font-weight-semibold);
    color: var(--color-navy);
    transition: background var(--transition-fast);
}

.faq-question:hover {
    background: var(--color-teal-pale);
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--color-teal);
    transition: transform var(--transition-fast);
}

.faq-item.active .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-fast);
}

.faq-answer__content {
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: var(--color-gray);
    line-height: 1.8;
}

.faq-answer__content ul {
    margin: var(--spacing-xs) 0 var(--spacing-xs) var(--spacing-md);
}

.faq-answer__content li {
    margin-bottom: 0.3rem;
}

/* --------------------------------------------------------------------------
   Section: Contact
   -------------------------------------------------------------------------- */
.contact-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
    margin-top: var(--spacing-lg);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.contact-item__icon {
    width: 50px;
    height: 50px;
    background: var(--color-teal);
    border-radius: var(--radius-circle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
}

.contact-item a {
    color: var(--color-white);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.contact-item a:hover {
    color: var(--color-teal-light);
}

.contact-address {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255,255,255,0.2);
}

.contact-address p {
    font-size: 0.95rem;
    opacity: 0.9;
}

/* Social Links */
.social-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.social-link {
    width: 45px;
    height: 45px;
    background: var(--color-teal);
    border-radius: var(--radius-circle);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.social-link:hover {
    background: var(--color-teal-light);
    transform: translateY(-3px);
}

.social-link svg {
    fill: var(--color-white);
}

/* --------------------------------------------------------------------------
   Layout: Footer
   -------------------------------------------------------------------------- */
.footer {
    background: var(--color-footer);
    color: #aaa;
    text-align: center;
    padding: var(--spacing-lg) 5%;
    font-size: 0.9rem;
}

.footer a {
    color: var(--color-teal-light);
    text-decoration: none;
}

/* --------------------------------------------------------------------------
   Components: WhatsApp Button
   -------------------------------------------------------------------------- */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1000;
}

.whatsapp-btn {
    width: 60px;
    height: 60px;
    background: var(--color-whatsapp);
    border-radius: var(--radius-circle);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    text-decoration: none;
}

.whatsapp-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.5);
}

.whatsapp-dropdown {
    position: absolute;
    bottom: 70px;
    right: 0;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: 0 5px 25px rgba(0,0,0,0.15);
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-fast);
    min-width: 220px;
}

.whatsapp-float:hover .whatsapp-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.whatsapp-dropdown a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    color: var(--color-navy);
    text-decoration: none;
    transition: background var(--transition-fast);
    font-size: 0.9rem;
}

.whatsapp-dropdown a:hover {
    background: var(--color-teal-pale);
}

/* --------------------------------------------------------------------------
   Responsive: Tablet & Mobile
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .hero__title {
        font-size: 2rem;
    }

    .nav ul {
        gap: var(--spacing-sm);
        font-size: 0.85rem;
    }

    .credentials {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .contact-info {
        flex-direction: column;
        align-items: center;
    }

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

    .whatsapp-float {
        bottom: 20px;
        right: 20px;
    }

    .whatsapp-btn {
        width: 55px;
        height: 55px;
    }

    .professional-logos {
        gap: var(--spacing-sm);
    }

    .professional-logos img {
        height: 45px;
    }

    .faq-question {
        font-size: 0.95rem;
        padding: 1.2rem;
    }
}