/* ====================================================================
   Photonarium Landing Page — Styles
   ==================================================================== */

/* ------------------------------------------------------------------ */
/* Custom properties                                                    */
/* ------------------------------------------------------------------ */
:root {
    --bg-primary:    #0a0a0f;
    --bg-secondary:  #12121a;
    --bg-card:       #1a1a25;
    --bg-navbar:     rgba(10, 10, 15, 0.85);

    --text-primary:  #e8e8f0;
    --text-secondary:#9a9ab0;
    --text-muted:    #6a6a80;

    --accent-purple: #9b59b6;
    --accent-pink:   #e056a0;
    --accent-blue:   #5b8def;
    --gradient:      linear-gradient(135deg, var(--accent-purple), var(--accent-pink), var(--accent-blue));
    --gradient-text:  linear-gradient(135deg, var(--accent-purple), var(--accent-pink));

    --border-color:  rgba(255, 255, 255, 0.06);
    --border-radius: 12px;

    --font-heading:  'Urbanist', 'Noto Sans', Arial, sans-serif;
    --font-body:     'Noto Sans', 'Urbanist', Arial, sans-serif;

    --container-max:  1200px;
    --section-pad:    6rem 0;
    --nav-height:     64px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: color 0.2s;
}
a:hover { color: var(--accent-pink); }

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

h1, h2, h3, h4 { font-family: var(--font-heading); line-height: 1.2; }

code {
    font-family: 'Consolas', 'Monaco', monospace;
    background: rgba(255, 255, 255, 0.08);
    padding: 0.15em 0.45em;
    border-radius: 4px;
    font-size: 0.9em;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
}

/* ------------------------------------------------------------------ */
/* Section title                                                        */
/* ------------------------------------------------------------------ */
.section-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ------------------------------------------------------------------ */
/* Buttons                                                              */
/* ------------------------------------------------------------------ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.6rem;
    border-radius: 8px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
    cursor: pointer;
    border: none;
}
.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
}
.btn:active { transform: translateY(0); }

.btn-primary {
    background: var(--gradient);
    color: #fff;
}
.btn-primary:hover { color: #fff; }

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}
.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--text-primary);
}

.btn-support {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    font-size: 0.95rem;
}
.btn-support:hover {
    background: rgba(155, 89, 182, 0.15);
    border-color: var(--accent-purple);
    color: var(--text-primary);
}

/* ------------------------------------------------------------------ */
/* Navbar                                                               */
/* ------------------------------------------------------------------ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--bg-navbar);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.nav-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    color: var(--text-primary);
}
.nav-brand:hover { color: var(--text-primary); }

.nav-logo {
    width: 32px;
    height: 32px;
    border-radius: 6px;
}

.nav-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.8rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    transition: color 0.2s;
}
.nav-links a:hover { color: var(--text-primary); }

.nav-github {
    display: flex;
    align-items: center;
}

/* Mobile hamburger toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform 0.3s, opacity 0.3s;
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ------------------------------------------------------------------ */
/* Hero                                                                 */
/* ------------------------------------------------------------------ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: calc(var(--nav-height) + 2rem) 2rem 4rem;
    position: relative;
    overflow: hidden;
}

/* Subtle radial glow behind the hero */
.hero::before {
    content: '';
    position: absolute;
    width: 800px;
    height: 800px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(155, 89, 182, 0.12) 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -55%);
    pointer-events: none;
}

.hero-inner {
    position: relative;
    max-width: 720px;
}

.hero-logo {
    width: 180px;
    height: 180px;
    margin: 0 auto 2.5rem;
    border-radius: 28px;
    /* Subtle glow matching the gradient */
    box-shadow: 0 0 60px rgba(155, 89, 182, 0.25), 0 0 120px rgba(224, 86, 160, 0.1);
}

.hero-headline {
    font-size: clamp(2rem, 5.5vw, 3.2rem);
    font-weight: 700;
    margin-bottom: 1.2rem;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-sub {
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
}

.hero-ctas {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ------------------------------------------------------------------ */
/* Features                                                             */
/* ------------------------------------------------------------------ */
.features {
    padding: var(--section-pad);
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2rem 1.5rem;
    transition: transform 0.2s, border-color 0.3s, box-shadow 0.3s;
}
.feature-card:hover {
    transform: translateY(-3px);
    border-color: rgba(155, 89, 182, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    margin-bottom: 1.2rem;
    background: rgba(155, 89, 182, 0.1);
    color: var(--accent-purple);
}

.feature-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.6rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ------------------------------------------------------------------ */
/* Screenshots Carousel                                                 */
/* ------------------------------------------------------------------ */
.screenshots {
    padding: var(--section-pad);
}

.carousel-wrapper {
    position: relative;
    max-width: 100%;
}

.carousel {
    display: flex;
    gap: 2rem;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    padding: 1rem 2rem 2rem;
    /* Hide scrollbar but keep functionality */
    scrollbar-width: none;
    -ms-overflow-style: none;
}
.carousel::-webkit-scrollbar { display: none; }

.carousel-slide {
    flex: 0 0 auto;
    width: min(80vw, 900px);
    scroll-snap-align: center;
}

.carousel-slide img {
    width: 100%;
    border-radius: var(--border-radius);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-color);
}

.carousel-slide figcaption {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 1rem;
    font-style: italic;
}

/* Carousel navigation arrows */
.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-60%);
    background: rgba(10, 10, 15, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
    z-index: 10;
}
.carousel-arrow:hover {
    background: rgba(155, 89, 182, 0.2);
    border-color: var(--accent-purple);
}
.carousel-arrow-left  { left: 0.75rem; }
.carousel-arrow-right { right: 0.75rem; }

/* Fade edges to hint at scrollable content */
.carousel-wrapper::before,
.carousel-wrapper::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 60px;
    pointer-events: none;
    z-index: 5;
}
.carousel-wrapper::before {
    left: 0;
    background: linear-gradient(to right, var(--bg-primary), transparent);
}
.carousel-wrapper::after {
    right: 0;
    background: linear-gradient(to left, var(--bg-primary), transparent);
}

/* ------------------------------------------------------------------ */
/* Getting Started                                                      */
/* ------------------------------------------------------------------ */
.getting-started {
    padding: var(--section-pad);
    background: var(--bg-secondary);
}

.steps {
    max-width: 680px;
    margin: 0 auto 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: 1.2rem;
}

.step-number {
    flex: 0 0 auto;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.1rem;
    color: #fff;
}

.step-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.step-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

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

.steps-note {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

/* ------------------------------------------------------------------ */
/* Support                                                              */
/* ------------------------------------------------------------------ */
.support {
    padding: var(--section-pad);
    text-align: center;
}

.support-message {
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 2.5rem;
    font-size: 1.05rem;
    line-height: 1.7;
}

.support-qr {
    max-width: 560px;
    margin: 0 auto 2rem;
    border-radius: var(--border-radius);
}

.support-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ------------------------------------------------------------------ */
/* Footer                                                               */
/* ------------------------------------------------------------------ */
.footer {
    padding: 2.5rem 0;
    border-top: 1px solid var(--border-color);
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}
.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
}
.footer-links a:hover { color: var(--text-primary); }

.footer-copy {
    color: var(--text-muted);
    font-size: 0.85rem;
}
.footer-copy a {
    color: var(--text-muted);
    text-decoration: underline;
    text-underline-offset: 2px;
}
.footer-copy a:hover { color: var(--text-secondary); }

/* ------------------------------------------------------------------ */
/* Responsive — tablet                                                  */
/* ------------------------------------------------------------------ */
@media (max-width: 900px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ------------------------------------------------------------------ */
/* Responsive — mobile                                                  */
/* ------------------------------------------------------------------ */
@media (max-width: 640px) {
    :root {
        --section-pad: 4rem 0;
        --nav-height: 56px;
    }

    /* Hamburger menu */
    .nav-toggle { display: flex; }

    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: var(--bg-navbar);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        flex-direction: column;
        gap: 0;
        padding: 0.5rem 0;
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: transform 0.3s, opacity 0.3s;
    }
    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    .nav-links li { width: 100%; }
    .nav-links li a {
        display: block;
        padding: 0.8rem 2rem;
    }
    /* Centre the GitHub icon on mobile */
    .nav-links li:last-child a {
        padding: 0.8rem 2rem;
    }

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

    .hero-logo {
        width: 130px;
        height: 130px;
    }

    .carousel-slide {
        width: min(90vw, 900px);
    }

    .carousel-arrow { display: none; }

    .hero-ctas {
        flex-direction: column;
        align-items: center;
    }

    .support-buttons {
        flex-direction: column;
        align-items: center;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }
}