/* =========================================
   ErgoStarter — Global Design System
   ========================================= */

:root {
    /* Brand Colors */
    --color-primary: #2f6f5e;
    --color-primary-dark: #245747;
    --color-primary-light: #e8f3ef;

    /* Neutral Colors */
    --color-white: #ffffff;
    --color-black: #111111;
    --color-heading: #17201d;
    --color-text: #4b5752;
    --color-muted: #78827e;

    /* Backgrounds */
    --color-background: #f8faf9;
    --color-surface: #ffffff;
    --color-surface-alt: #f0f4f2;

    /* Borders */
    --color-border: #e1e7e4;

    /* Typography */
    --font-primary:
        Inter,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        Helvetica,
        Arial,
        sans-serif;

    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 2rem;
    --text-4xl: 2.75rem;
    --text-5xl: 4rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;

    /* Layout */
    --container-width: 1200px;
    --content-width: 800px;

    /* UI */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --shadow-sm: 0 2px 8px rgba(17, 17, 17, 0.05);
    --shadow-md: 0 8px 24px rgba(17, 17, 17, 0.08);

    /* Animation */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}


/* =========================================
   Reset
   ========================================= */

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


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


body {
    font-family: var(--font-primary);
    background: var(--color-background);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}


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


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


button,
input,
textarea,
select {
    font: inherit;
}


button {
    cursor: pointer;
    border: none;
}


ul,
ol {
    list-style: none;
}


/* =========================================
   Typography
   ========================================= */

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--color-heading);
    line-height: 1.2;
    font-weight: 700;
}


h1 {
    font-size: var(--text-5xl);
    letter-spacing: -0.04em;
}


h2 {
    font-size: var(--text-4xl);
    letter-spacing: -0.03em;
}


h3 {
    font-size: var(--text-2xl);
}


p {
    margin-bottom: var(--space-4);
}


strong {
    color: var(--color-heading);
}


/* =========================================
   Layout
   ========================================= */

.container {
    width: min(100% - 2rem, var(--container-width));
    margin-inline: auto;
}


.content-container {
    width: min(100% - 2rem, var(--content-width));
    margin-inline: auto;
}


.section {
    padding-block: var(--space-20);
}


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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);

    padding: 0.75rem 1.25rem;

    border-radius: var(--radius-sm);

    font-size: var(--text-sm);
    font-weight: 600;

    transition:
        background-color var(--transition-normal),
        color var(--transition-normal),
        transform var(--transition-fast),
        box-shadow var(--transition-normal);
}


.btn:hover {
    transform: translateY(-2px);
}


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


.btn-primary:hover {
    background: var(--color-primary-dark);
    box-shadow: var(--shadow-sm);
}


.btn-secondary {
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
}


.btn-secondary:hover {
    background: #dcece6;
}


/* =========================================
   Cards
   ========================================= */

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;

    transition:
        transform var(--transition-normal),
        box-shadow var(--transition-normal);
}


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


/* =========================================
   Utility Classes
   ========================================= */

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


.text-muted {
    color: var(--color-muted);
}


.text-primary {
    color: var(--color-primary);
}


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


.hidden {
    display: none;
}

.hero-image {
    display: block;
    width: 100%;
    max-width: 560px;
    height: auto;
    margin: 0 auto;
    border-radius: var(--radius-lg);
    object-fit: cover;
    box-shadow: 0 18px 45px rgba(20, 30, 25, 0.12);
}