/*Developed by Cristian Ceni 2025, all the rights are reserved*/

:root {
    --col-background: #090909;
    --col-surface: #111111;
    --col-testi: #ffffff;
    --col-ghost: #999999;
    --accent: #ffffff;
    --ring: rgba(255,255,255,0.08);
    --ring-strong: rgba(255,255,255,0.18);
    --gap: clamp(20px, 5vw, 40px);
    --radius-sm: 16px;
    --radius-lg: 32px;
    --nav-height: 80px;
    --content-width: min(1100px, 90%);
    --blur-amount: 12px;
    --side-padding: clamp(16px, 4vw, 44px);

    --shadow-sm: 0 1px 0 rgba(255,255,255,0.05), 0 14px 40px rgba(0,0,0,0.35);

    --font-sans: "Google Sans", "Product Sans", Roboto, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
    --font-meta: Roboto, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
}

/* Base styles */
html {
    scroll-behavior: smooth;
}

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

body {
    background-color: var(--col-background);
    font-family: var(--font-sans);
    font-size: 16px;
    margin: 0;
    padding: 0;
    color: var(--col-testi);
    line-height: 1.55;
    overflow-x: hidden;
    animation: fadeIn 1s forwards;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6,
p, a, button, input, textarea, select {
    font-family: var(--font-sans);
}

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

input::placeholder,
textarea::placeholder {
    color: rgba(255,255,255,0.5);
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: 
        radial-gradient(circle at 5% 15%, rgba(100,100,255,0.03), transparent 25%),
        radial-gradient(circle at 95% 85%, rgba(255,100,100,0.03), transparent 25%),
        radial-gradient(circle at 50% 50%, rgba(255,255,255,0.01), transparent 50%);
    pointer-events: none;
    z-index: 0;
}

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

a:focus-visible,
button:focus-visible {
    outline: 2px solid rgba(255,255,255,0.35);
    outline-offset: 3px;
    border-radius: 10px;
}

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

/* Header & Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
}

.nav::before {
    content: '';
    position: absolute;
    inset: 0;
    background-color: rgba(10, 10, 10, 0.85);
    border-bottom: 1px solid var(--ring);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 0;
}

.nav-wrap {
    position: relative;
    width: var(--content-width);
    height: 100%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0;
}

.loghetto {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    font-weight: 500;
}

.loghetto p {
    margin: 0;
    color: var(--col-testi);
}

.brand {
    width: 40px;
    height: 40px;
    display: block;
}

.brand img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 8px;
}

#site-menu {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
    margin: 0;
    padding: 0;
}

#site-menu a {
    display: inline-block;
    padding: 8px 12px;
    font-size: 15px;
    font-weight: 400;
    color: rgba(255,255,255,0.72);
    transition: 0.2s ease;
}

#site-menu a:hover {
    color: var(--col-testi);
}

/* Hero section */
.hero {
    position: relative;
    padding: calc(var(--nav-height) + var(--gap) * 3) var(--side-padding) calc(var(--gap) * 3);
}

.hero-grid {
    position: relative;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--gap);
    align-items: center;
    background: var(--col-surface);
    border: 1px solid var(--ring);
    border-radius: var(--radius-lg);
    padding: calc(var(--gap) * 2);
    box-shadow: var(--shadow-sm);
}

.hero h1 {
    font-size: clamp(44px, 5.5vw, 64px);
    line-height: 1.1;
    margin: 0 0 24px;
    letter-spacing: -0.02em;
    background: linear-gradient(to right, var(--col-testi), rgba(255,255,255,0.8));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero p {
    font-size: 17px;
    line-height: 1.6;
    color: var(--col-ghost);
    margin: 0 0 24px;
    max-width: 580px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-width: 140px;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 500;
    letter-spacing: 0.3px;
    border: 1px solid var(--col-testi);
    border-radius: 999px;
    background: transparent;
    color: var(--col-testi);
    transition: all 0.2s ease;
}

.btn:hover {
    background: rgba(255,255,255,0.05);
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn.ghost {
    border-color: var(--col-ghost);
    color: var(--col-ghost);
}

.btn.ghost:hover {
    border-color: var(--col-testi);
    color: var(--col-testi);
}

/* Tags */
.tag,
.tag-click {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.3px;
    border-radius: 999px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--ring);
    color: rgba(255,255,255,0.78);
    transition: all 0.2s ease;
    margin: 0;
    white-space: nowrap;
    width: fit-content;
    flex: 0 0 auto;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tag-click {
    cursor: pointer;
}

.tags {
    gap: 8px;
    row-gap: 10px;
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px solid rgba(255,255,255,0.06);
}

.tag-click:hover {
    transform: translateY(-2px);
    border-color: rgba(255,255,255,0.2);
    color: var(--col-testi);
    box-shadow: var(--shadow-sm);
}

/* Mobile navigation */
.nav-toggle {
    display: none;
}

@media (max-width: 800px) {
    .nav-toggle {
        position: relative;
        display: flex;
        justify-content: center;
        align-items: center;
        width: 40px;
        height: 40px;
        margin-left: 8px;
        padding: 0;
        background: rgba(255,255,255,0.03);
        border: 1px solid var(--ring);
        border-radius: 8px;
        cursor: pointer;
        transition: 0.2s ease;
    }

    .nav-toggle:hover {
        background: rgba(255,255,255,0.05);
    }

    .nav-toggle:active {
        background: rgba(255,255,255,0.02);
    }

    .nav-toggle span {
        position: absolute;
        width: 18px;
        height: 2px;
        background: var(--col-testi);
        border-radius: 2px;
        transition: transform 0.25s ease, opacity 0.2s ease;
    }

    .nav-toggle span:nth-child(1) { transform: translateY(-6px); }
    .nav-toggle span:nth-child(2) { opacity: 1; }
    .nav-toggle span:nth-child(3) { transform: translateY(6px); }

    .nav-toggle.active span:nth-child(1) { transform: rotate(45deg); }
    .nav-toggle.active span:nth-child(2) { opacity: 0; }
    .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg); }

    .nav {
        height: var(--nav-height);
    }

    .nav-wrap {
        padding: 0 var(--gap);
    }

    .brand {
        width: 34px;
        height: 34px;
    }

    #site-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        display: block;
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-top: 1px solid var(--ring);
        padding: 8px 0;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: transform 0.3s ease, opacity 0.2s ease, visibility 0.3s ease;
    }

    #site-menu.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    #site-menu a {
        display: block;
        padding: 16px var(--gap);
        border-bottom: 1px solid rgba(255,255,255,0.03);
    }

    #site-menu li:last-child a {
        border-bottom: none;
    }

    #site-menu a:active {
        background: rgba(255,255,255,0.03);
        color: var(--col-testi);
    }

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

    .hero p {
        margin-left: auto;
        margin-right: auto;
    }

    .row {
        justify-content: center;
    }
}

/* Main content wrapper */
main, section {
    width: var(--content-width);
    margin: 0 auto;
    padding: calc(var(--gap) * 2) 0;
    position: relative;
    z-index: 1;
}

/* Adjust spacing for first section to prevent navbar overlap */
main {
    padding-top: calc(var(--nav-height) + var(--gap) * 2);
}

section {
    scroll-margin-top: calc(var(--nav-height) + 18px);
}


section h2 {
    font-size: clamp(28px, 3.2vw, 36px);
    font-weight: 600;
    margin: 0 0 12px;
    letter-spacing: -0.02em;
}

section > .sub {
    font-size: 16px;
    color: var(--col-ghost);
    margin-bottom: 28px;
    margin-top: 0;
    font-family: var(--font-sans);
    letter-spacing: 0.005em;
}

.grid {
    display: grid;
    gap: var(--gap);
    width: 100%;
}

.grid.cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 800px) {
    .grid.cols-3 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        max-width: 600px;
        margin: 0 auto;
    }
}

@media (max-width: 500px) {
    .grid.cols-3 {
        grid-template-columns: minmax(0, 1fr);
        max-width: 400px;
        margin: 0 auto;
    }
}

.card {
    background: var(--col-surface);
    border: 1px solid var(--ring);
    border-radius: var(--radius-sm);
    padding: var(--gap);
    transition: 0.3s ease;
    display: flex;
    flex-direction: column;
}

.card:hover {
    border-color: var(--ring-strong);
    transform: translateY(-2px);
}

.card h3 {
    font-size: 20px;
    margin: 0 0 8px;
    line-height: 1.3;
    letter-spacing: -0.01em;
}

.card img + h3 {
    margin-top: 12px;
}

.card p {
    color: var(--col-ghost);
    margin: 0 0 16px;
}

.card .meta {
    font-family: var(--font-meta);
    font-size: 13px;
    line-height: 1.35;
    letter-spacing: 0.01em;
    color: rgba(255,255,255,0.82);
    margin: 0 0 10px;
}

.card a:hover .meta {
    text-decoration: underline;
    text-underline-offset: 3px;
}

.card h3 + .meta {
    margin-top: 2px;
}

.card.light {
    background: var(--col-testi);
    color: #111111;
    border-color: rgba(0,0,0,0.08);
}

.card.light p {
    color: rgba(0,0,0,0.7);
}

.card.light .btn {
    border-color: rgba(0,0,0,0.6);
    color: rgba(0,0,0,0.85);
}

.card.light .btn:hover {
    background: rgba(0,0,0,0.04);
}

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

.card img {
    margin: 10px 0;
}

#about .avatar {
    width: 104px;
    height: 104px;
    display: block;
    margin: 18px auto 26px;
    border-radius: 999px;
    border: 1px solid var(--ring);
    object-fit: cover;
}

#about {
    text-align: center;
}

#about .wrap {
    text-align: left;
}

.row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin: 0;
}

.row.tags {
    justify-content: flex-start;
}

.pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: rgba(255,255,255,0.86);
    padding: 8px 14px;
    border: 1px solid var(--ring);
    border-radius: 999px;
    background: rgba(255,255,255,0.03);
}

/* Utilities */
.wrap {
    max-width: 800px;
    margin: 0 auto;
}

.u {
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: rgba(255,255,255,0.35);
}

footer {
    width: var(--content-width);
    margin: 0 auto;
    padding: 0 0 calc(var(--gap) * 1.5);
    position: relative;
    z-index: 1;
    text-align: center;
    color: rgba(255,255,255,0.55);
}

footer p {
    margin: 0;
    font-size: 14px;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}