/*
===============================================
FILE: style.css
PURPOSE: Main stylesheet for the developer portfolio
PROJECT: 1.1 Personal Developer Portfolio
AUTHOR: Sebastian Larsen (SkinShredder)
DATE: 2026-02-17
===============================================
*/

/* ==================== DESIGN TOKENS ====================
   
   ALL colors, fonts, sizes, and spacing are defined here.
   To change the entire look of the site, edit ONLY this section.
   Everything below uses var(--token-name) to reference these values.
   
   ====================================================== */

:root {
    /* --- Colors --- */
    --color-bg-primary:    #0f172a;
    --color-bg-secondary:  #1e293b;
    --color-text-primary:  #e2e8f0;
    --color-text-secondary:#94a3b8;
    --color-heading:       #f8fafc;
    --color-accent:        #3b82f6;
    --color-accent-hover:  #60a5fa;
    --color-border:        #334155;
    --color-card-bg:       #1e293b;
    --color-tag-bg:        #1e3a5f;
    --color-tag-text:      #93c5fd;

    /* --- Fonts --- */
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body:    'Inter', sans-serif;
    --font-code:    'Fira Code', monospace;

    /* --- Font sizes --- */
    --text-sm:   0.875rem;
    --text-base: 1rem;
    --text-lg:   1.125rem;
    --text-xl:   1.25rem;
    --text-2xl:  1.5rem;
    --text-3xl:  2rem;
    --text-4xl:  2.5rem;
    --text-hero: 3.5rem;

    /* --- Spacing --- */
    --space-xs:  0.5rem;
    --space-sm:  0.75rem;
    --space-md:  1rem;
    --space-lg:  1.5rem;
    --space-xl:  2rem;
    --space-2xl: 3rem;
    --space-3xl: 5rem;

    /* --- Layout --- */
    --container-max-width: 1100px;
    --container-padding:   1.5rem;
    --border-radius:       0.5rem;
    --border-radius-lg:    0.75rem;

    /* --- Transitions --- */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;

    /* --- Header --- */
    --header-height: 4rem;
}


/* ==================== RESET & BASE ==================== */

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

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

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.7;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
}

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

a:hover {
    color: var(--color-accent-hover);
}

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

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


/* ==================== REUSABLE COMPONENTS ==================== */

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

.section {
    padding: var(--space-3xl) 0;
}

.section--alt {
    background-color: var(--color-bg-secondary);
}

.section__title {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-2xl);
    text-align: center;
}

/* --- Buttons --- */

.btn {
    display: inline-block;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--border-radius);
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
}

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

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

.btn--outline {
    background-color: transparent;
    color: var(--color-accent);
    border-color: var(--color-accent);
}

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

.btn--small {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--text-sm);
    background-color: var(--color-accent);
    color: var(--color-heading);
    border-color: var(--color-accent);
}

.btn--small:hover {
    background-color: var(--color-accent-hover);
    color: var(--color-heading);
}

/* --- Tags --- */

.tag {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    background-color: var(--color-tag-bg);
    color: var(--color-tag-text);
    font-size: var(--text-sm);
    border-radius: var(--border-radius);
    font-family: var(--font-code);
}


/* ==================== HEADER & NAVIGATION ==================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
    display: flex;
    align-items: center;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.nav__logo {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-heading);
}

.nav__logo:hover {
    color: var(--color-accent);
}

.nav__menu {
    display: flex;
    gap: var(--space-xl);
    list-style: none;
}

.nav__link {
    color: var(--color-text-secondary);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav__link:hover {
    color: var(--color-accent);
}

.header--scrolled {
    background-color: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
}

/* --- Hamburger button (hidden on desktop) --- */

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.nav__toggle-bar {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--color-text-primary);
    transition: all var(--transition-base);
}


/* ==================== HERO SECTION ==================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
}

.hero__greeting {
    font-size: var(--text-lg);
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
}

.hero__name {
    font-size: var(--text-hero);
    margin-bottom: var(--space-sm);
}

.hero__tagline {
    font-size: var(--text-2xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
}

.hero__description {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin-bottom: var(--space-xl);
}

.hero__buttons {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}


/* ==================== ABOUT SECTION ==================== */

.about__content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.about__content p {
    margin-bottom: var(--space-lg);
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
}


/* ==================== SKILLS SECTION ==================== */

.skills__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
}

.skill-card {
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    transition: border-color var(--transition-fast);
}

.skill-card:hover {
    border-color: var(--color-accent);
}

.skill-card__title {
    font-size: var(--text-xl);
    margin-bottom: var(--space-xs);
}

.skill-card__level {
    font-size: var(--text-sm);
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
    font-family: var(--font-code);
}

.skill-card__description {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}


/* ==================== PROJECTS SECTION ==================== */

/* Filter bar */
.projects__filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-lg);
    justify-content: center;
    margin-bottom: var(--space-xl);
}

.filter-group {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    flex-wrap: wrap;
}

.filter-group__label {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-right: var(--space-xs);
}

.filter-btn {
    padding: 0.3rem 0.75rem;
    font-family: var(--font-code);
    font-size: var(--text-sm);
    background-color: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.filter-btn.active {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-heading);
}

/* Project meta (type + date) */
.project-card__meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
}

.project-card__type {
    font-family: var(--font-code);
    font-size: var(--text-sm);
    color: var(--color-accent);
    font-weight: 500;
}

.project-card__date {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

/* Empty state */
.projects__empty {
    text-align: center;
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
    padding: var(--space-2xl);
}

.hidden {
    display: none !important;
}

/* Filtered-out cards */
.project-card--hidden {
    display: none;
}

/* Outline variant for small buttons */
.btn--small-outline {
    background-color: transparent;
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.btn--small-outline:hover {
    background-color: var(--color-accent);
    color: var(--color-heading);
}

.projects__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-xl);
}

.project-card {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.project-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.project-card__image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.project-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-card__placeholder {
    width: 100%;
    height: 100%;
    background-color: var(--color-bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    border-bottom: 1px solid var(--color-border);
}

.project-card__content {
    padding: var(--space-xl);
}

.project-card__title {
    font-size: var(--text-xl);
    margin-bottom: var(--space-sm);
}

.project-card__description {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    margin-bottom: var(--space-lg);
}

.project-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-lg);
}

.project-card__links {
    display: flex;
    gap: var(--space-sm);
}


/* ==================== CONTACT SECTION ==================== */

.contact {
    text-align: center;
}

.contact__text {
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
    max-width: 500px;
    margin: 0 auto var(--space-xl);
}

.contact__links {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}


/* ==================== FOOTER ==================== */

.footer {
    padding: var(--space-xl) 0;
    text-align: center;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}


/* ==================== RESPONSIVE DESIGN ==================== */

/* --- Tablet and below (768px) --- */
@media (max-width: 768px) {

    .hero__name {
        font-size: var(--text-4xl);
    }

    .hero__tagline {
        font-size: var(--text-xl);
    }

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

    /* Mobile navigation */
    .nav__toggle {
        display: flex;
    }

    .nav__menu {
        position: fixed;
        top: var(--header-height);
        right: -100%;
        width: 70%;
        height: calc(100vh - var(--header-height));
        background-color: var(--color-bg-secondary);
        flex-direction: column;
        padding: var(--space-2xl) var(--space-xl);
        gap: var(--space-xl);
        transition: right var(--transition-base);
        border-left: 1px solid var(--color-border);
    }

    .nav__menu--open {
        right: 0;
    }

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

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

    .filter-group {
        justify-content: center;
    }
}

/* ==================== NOTIFY SECTION ==================== */
.notify__text {
    text-align: center;
    color: var(--color-text-muted);
    max-width: 500px;
    margin: 0 auto 2rem;
    line-height: 1.7;
}

.notify__form {
    display: flex;
    justify-content: center;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.notify__form iframe {
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

/* --- Small phones (480px) --- */
@media (max-width: 480px) {

    .hero__name {
        font-size: var(--text-3xl);
    }

    .hero__buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

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

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