/* ===== CSS Variables ===== */
:root {
    --dark-gray: #2B2D42;
    --light-gray: #8D99AE;
    --white: #FFFFFF;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-sans);
    color: var(--dark-gray);
    background-color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
    opacity: 0;
    transition: opacity 0.5s ease;
}

body.loaded {
    opacity: 1;
}

body.fade-out {
    opacity: 0;
    transition: opacity 0.3s ease;
}

/* ===== Homepage ===== */
body.homepage {
    /* uses body.no-scroll for viewport lock */
}

/* ===== Navigation ===== */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2.5rem 3rem 0 3rem;
    background-color: var(--white);
    z-index: 1000;
}

.logo {
    font-family: var(--font-sans);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--dark-gray);
    text-decoration: none;
    transition: var(--transition);
}

.logo:hover {
    opacity: 0.6;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--dark-gray);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 400;
    transition: var(--transition);
}

.nav-links a:hover {
    opacity: 0.5;
}

/* ===== Homepage Content ===== */
.homepage-content {
    max-width: 580px;
    padding: 4rem 3rem 0 3rem;
}

.main-title {
    font-family: var(--font-sans);
    font-size: 3rem;
    font-weight: 700;
    color: var(--dark-gray);
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.intro-text {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--dark-gray);
    margin-bottom: 2.5rem;
}

.intro-text a {
    color: var(--dark-gray);
    text-decoration: none;
    transition: var(--transition);
}

.intro-text a:hover {
    color: var(--light-gray);
}

.text-section {
    margin-bottom: 2.5rem;
}

.section-heading {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    color: var(--dark-gray);
    margin-bottom: 0.5rem;
}

.section-text {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--dark-gray);
}

/* ===== Footer ===== */
.footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 3rem;
    background-color: var(--white);
    color: var(--light-gray);
    font-size: 0.85rem;
}

/* Pin footer to bottom on no-scroll pages */
body.no-scroll {
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

body.no-scroll main {
    flex: 1;
}

body.no-scroll .footer {
    margin-top: auto;
}

/* Strong, page-specific footer inset for the main homepage (index.html) */
body.homepage.no-scroll .homepage-footer {
    position: relative;
    bottom: calc(2.75rem + env(safe-area-inset-bottom, 0px));
    padding-bottom: 1.5rem !important;
    margin-bottom: 0 !important;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .navbar {
        padding: 1.5rem 1.5rem 0;
    }

    .nav-links {
        gap: 1.5rem;
    }

    .homepage-content {
        padding: 2.5rem 1.5rem 0;
    }

    .main-title {
        font-size: 2.5rem;
        margin-bottom: 1.25rem;
    }

    .intro-text {
        font-size: 0.9rem;
        margin-bottom: 1.5rem;
    }

    .text-section {
        margin-bottom: 1.5rem;
    }

    .section-text {
        font-size: 0.9rem;
    }

    .footer {
        padding: 1rem 1.5rem;
        font-size: 0.75rem;
    }

    body.homepage.no-scroll .homepage-footer {
        position: relative;
        bottom: calc(1.9rem + env(safe-area-inset-bottom, 0px));
        padding-bottom: 1rem !important;
        margin-bottom: 0 !important;
    }

    /* Allow scrolling on mobile for no-scroll pages */
    body.no-scroll {
        height: auto;
        overflow: auto;
        min-height: 100vh;
    }
}

@media (max-width: 480px) {
    .navbar {
        padding: 1.25rem 1.25rem 0;
    }

    .nav-links {
        gap: 0.75rem;
    }

    .nav-links a {
        font-size: 0.8rem;
    }

    .logo {
        font-size: 1rem;
    }

    .homepage-content {
        padding: 2rem 1.25rem 0;
    }

    .main-title {
        font-size: 2rem;
    }

    .intro-text {
        font-size: 0.85rem;
        line-height: 1.6;
        margin-bottom: 1.25rem;
    }

    .text-section {
        margin-bottom: 1.25rem;
    }

    .section-heading {
        font-size: 0.65rem;
    }

    .section-text {
        font-size: 0.85rem;
        line-height: 1.6;
    }

    .footer {
        padding: 1rem 1.25rem;
        font-size: 0.7rem;
    }

    body.homepage.no-scroll .homepage-footer {
        position: relative;
        bottom: calc(1.4rem + env(safe-area-inset-bottom, 0px));
        padding-bottom: 1rem !important;
        margin-bottom: 0 !important;
    }
}