/* =========================================================================
   # Base Variables & Reset
   ========================================================================= */

:root {
    /* Color Palette - Clean, Minimal, Modern */
    --color-bg: #FAFAFA;
    --color-card-bg: #FFFFFF;

    --color-text-main: #1A1A1A;
    --color-text-light: #666666;

    --color-primary: #1A1A1A;
    --color-primary-hover: #404040;

    --color-white: #FFFFFF;
    --color-border: #EAEAEA;

    /* Typography */
    --font-main: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* Utilities */
    --transition-fast: all 0.2s ease-in-out;
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 12px 24px rgba(0, 0, 0, 0.08);
}

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

body {
    font-family: var(--font-main);
    color: var(--color-text-main);
    background-color: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

/* =========================================================================
   # Layout & Typography Structure
   ========================================================================= */

.page-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

/* =========================================================================
   # Hero Section
   ========================================================================= */

.hero {
    padding: 100px 0 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-light);
    font-weight: 400;
    letter-spacing: 0.02em;
}

.hero-divider {
    width: 40px;
    height: 3px;
    background-color: var(--color-primary);
    margin: 32px auto 0;
}

/* =========================================================================
   # Portfolio Grid Section
   ========================================================================= */

.portfolio-section {
    flex: 1;
    padding: 40px 0 100px;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

/* =========================================================================
   # Portfolio Card
   ========================================================================= */

.portfolio-card {
    background-color: var(--color-card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    height: 100%;
}

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

.card-image-wrapper {
    position: relative;
    width: 100%;
    padding-top: 66.66%;
    /* 3:2 Aspect Ratio */
    overflow: hidden;
    background-color: #f0f0f0;
}

.card-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.portfolio-card:hover .card-image {
    transform: scale(1.05);
}

.card-content {
    padding: 32px 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.card-description {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin-bottom: 24px;
    flex: 1;
    /* Pushes the button to the bottom */
}

/* =========================================================================
   # Tags & Links
   ========================================================================= */

.portfolio-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.tag {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-light);
    background-color: var(--color-bg);
    padding: 4px 10px;
    border-radius: 4px;
    border: 1px solid var(--color-border);
}

.portfolio-links {
    display: flex;
    gap: 10px;
    margin-top: auto;
}

.portfolio-links .btn {
    flex: 1;
}

/* =========================================================================
   # Buttons
   ========================================================================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition-fast);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    align-self: center;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    border: 1px solid var(--color-primary);
}

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

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn-outline:hover {
    background-color: var(--color-bg);
}

/* =========================================================================
   # Flow Section
   ========================================================================= */

.flow-section {
    padding: 80px 0 100px;
    background-color: var(--color-bg);
}

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

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: 0.05em;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--color-text-light);
    letter-spacing: 0.05em;
}

.section-divider {
    width: 30px;
    height: 3px;
    background-color: var(--color-primary);
    margin: 20px auto 0;
}

.flow-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}

.flow-card {
    background-color: var(--color-card-bg);
    padding: 32px 24px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    transition: var(--transition-fast);
}

.flow-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.flow-step {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-border);
    margin-bottom: 16px;
    line-height: 1;
    font-family: var(--font-main);
    transition: color var(--transition-fast);
}

.flow-card:hover .flow-step {
    color: var(--color-primary);
}

.flow-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.flow-description {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

.flow-info {
    display: inline-block;
    background-color: var(--color-card-bg);
    padding: 16px 32px;
    border-radius: 50px;
    border: 1px solid var(--color-border);
    font-size: 1rem;
}

.info-label {
    font-weight: 600;
    color: var(--color-text-main);
}

.info-value {
    color: var(--color-text-light);
}

/* =========================================================================
   # Footer
   ========================================================================= */

.footer {
    padding: 40px 0;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-light);
    font-size: 0.85rem;
    background-color: var(--color-card-bg);
}

/* =========================================================================
   # Responsive Design
   ========================================================================= */

@media (max-width: 992px) {
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 768px) {
    .hero {
        padding: 80px 0 40px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .flow-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    /* On mobile, full width buttons feel better */
    .btn {
        width: 100%;
    }
}