/* ==========================================================================
   TSM Software Services - Styles
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
    /* Nature-inspired color palette */
    --color-sage: #7d9a78;
    --color-sage-light: #a8c4a2;
    --color-sage-dark: #5c7a57;
    --color-earth: #8b7355;
    --color-earth-light: #c4b5a5;
    --color-stone: #6b6b6b;
    --color-cream: #faf9f7;
    --color-white: #ffffff;
    --color-charcoal: #2d3436;
    --color-text: #3d4449;
    --color-text-light: #636e72;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 1rem;
    --font-size-sm: 0.875rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;
    --font-size-4xl: 3rem;
    --line-height-base: 1.6;
    --line-height-tight: 1.3;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;

    /* Layout */
    --max-width: 1200px;
    --border-radius: 4px;
    --border-radius-lg: 8px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

/* --------------------------------------------------------------------------
   Reset & Base Styles
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
    color: var(--color-sage);
}

h1, h2, h3, h4, h5, h6 {
    color: var(--color-charcoal);
    line-height: var(--line-height-tight);
    font-weight: 500;
}

h1 {
    font-size: var(--font-size-3xl);
}

h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-md);
}

h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-sm);
}

p {
    margin-bottom: var(--space-sm);
}

/* --------------------------------------------------------------------------
   Utility Classes
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-bottom: var(--space-xl);
    text-align: center;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-block;
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-align: center;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: var(--color-sage-dark);
    border-color: var(--color-sage-dark);
    color: var(--color-white);
}

/* --------------------------------------------------------------------------
   Header & Navigation
   -------------------------------------------------------------------------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-earth-light);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-charcoal);
    letter-spacing: -0.02em;
}

.logo:hover {
    color: var(--color-sage-dark);
}

.logo img {
    height: 80px;
    width: auto;
}

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

.nav-links a {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-xs) 0;
    position: relative;
}

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

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

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

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

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
    min-height: 100vh;
    padding: calc(80px + var(--space-2xl)) var(--space-md) var(--space-2xl);
    max-width: var(--max-width);
    margin: 0 auto;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-content h1 {
    margin-bottom: var(--space-md);
    font-size: var(--font-size-4xl);
    font-weight: 400;
    letter-spacing: -0.02em;
}

.hero-tagline {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-bottom: var(--space-lg);
    line-height: 1.7;
}


/* --------------------------------------------------------------------------
   Services Section
   -------------------------------------------------------------------------- */
.services {
    padding: var(--space-3xl) var(--space-md);
    background-color: var(--color-cream);
}

.services h2 {
    text-align: center;
}

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

.service-card {
    background-color: var(--color-white);
    padding: var(--space-xl) var(--space-lg);
    border-radius: var(--border-radius-lg);
    text-align: center;
    border: 1px solid var(--color-earth-light);
    transition: all var(--transition-base);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
    border-color: var(--color-sage-light);
}

.service-icon {
    color: var(--color-sage);
    margin-bottom: var(--space-md);
}

.service-card h3 {
    color: var(--color-charcoal);
    font-size: var(--font-size-lg);
}

.service-card p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   About Section
   -------------------------------------------------------------------------- */
.about {
    padding: var(--space-3xl) var(--space-md);
}

.about .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.about-content h2 {
    margin-bottom: var(--space-md);
}

.about-content p {
    color: var(--color-text-light);
    font-size: var(--font-size-lg);
    line-height: 1.8;
}

.about-content p:last-child {
    margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Contact Section
   -------------------------------------------------------------------------- */
.contact {
    padding: var(--space-3xl) var(--space-md);
    background-color: var(--color-cream);
    text-align: center;
}

.contact h2 {
    margin-bottom: var(--space-sm);
}

.contact-form {
    max-width: 500px;
    margin: 0 auto;
    text-align: left;
}

.form-group {
    margin-bottom: var(--space-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 500;
    color: var(--color-text);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-sm);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    border: 1px solid var(--color-earth-light);
    border-radius: var(--border-radius);
    background-color: var(--color-white);
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-sage);
}

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

.contact-form .btn {
    width: 100%;
}

/* --------------------------------------------------------------------------
   Thank You Page
   -------------------------------------------------------------------------- */
.thank-you {
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: calc(80px + var(--space-2xl)) var(--space-md) var(--space-2xl);
}

.thank-you h1 {
    margin-bottom: var(--space-md);
}

.thank-you p {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-bottom: var(--space-lg);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    padding: var(--space-lg) var(--space-md);
    background-color: var(--color-charcoal);
    text-align: center;
}

.footer p {
    color: var(--color-earth-light);
    font-size: var(--font-size-sm);
    margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Responsive Design
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-3xl: 2rem;
        --font-size-4xl: 2.5rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--color-white);
        padding: var(--space-lg);
        gap: var(--space-md);
        border-bottom: 1px solid var(--color-earth-light);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .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 {
        grid-template-columns: 1fr;
        text-align: center;
        min-height: auto;
        padding-top: calc(80px + var(--space-xl));
    }

    .hero-image {
        order: -1;
    }

    .about .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-image {
        order: -1;
    }

    .contact-info {
        flex-direction: column;
        gap: var(--space-md);
    }
}

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