/* Advent Pro Font from Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Advent+Pro:wght@400;500;700;800&family=ABeeZee:ital@0;1&display=swap');

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    overflow-x: hidden;
}

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

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

button {
    border: none;
    background: none;
    font: inherit;
    cursor: pointer;
}

/* CSS Custom Properties */
:root {
    /* Colors */
    --color-red: #F95355;
    --color-lavender: #BCB6CE;
    --color-beige: #B4A688;
    --color-grey: #C7C8D2;
    --color-white: #FFFFFF;
    --color-black: #000000;
    --color-dark: #1a1a1a;

    /* Typography */
    --font-primary: 'Advent Pro', sans-serif;
    --font-logo: 'ABeeZee', sans-serif;

    /* Font Sizes */
    --fs-nav: 1.25rem;           /* 20px */
    --fs-logo: 1.5rem;           /* 24px */
    --fs-body: 1.5rem;           /* 24px */
    --fs-card-title: 2rem;       /* 32px */
    --fs-contact-link: 3.125rem; /* 50px */
    --fs-heading: 6.25rem;       /* 100px */

    /* Spacing */
    --spacing-xs: 1.25rem;   /* 20px */
    --spacing-sm: 2.5rem;    /* 40px */
    --spacing-md: 3.75rem;   /* 60px */
    --spacing-lg: 5rem;      /* 80px */
    --spacing-xl: 12.5rem;   /* 200px */

    /* Container */
    --container-max: 1280px;
    --container-padding: var(--spacing-sm);

    /* Border Radius */
    --radius-sm: 0.5rem;     /* 8px */
    --radius-md: 2.5rem;     /* 40px */
}

/* Base Styles */
body {
    font-family: var(--font-primary);
    font-weight: 400;
    line-height: 1.5;
    color: var(--color-black);
    background: var(--color-white);
    overflow-x: hidden;
}

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

/* Typography */
.section-heading {
    font-size: var(--fs-heading);
    font-weight: 800;
    line-height: 1;
    margin: 0;
}

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

.section-description {
    font-size: var(--fs-body);
    font-weight: 400;
    line-height: 1.5;
}

/* Header */
.header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: transparent;
    width: 100%;
}

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

.header__content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    gap: var(--spacing-sm);
    width: 100%;
}

.header__logo {
    font-family: var(--font-logo);
    font-size: var(--fs-logo);
    line-height: 1.2;
    flex: 1;
}

.header__logo p {
    margin: 0;
}

.header__brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    text-decoration: none;
}

.header__brand-icon {
    height: 3.5rem;
    width: auto;
}

.header__brand-text {
    height: 1.125rem;
    width: auto;
}

.header__nav {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    justify-content: flex-end;
    flex: 1;
}

.nav-link {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
}

.nav-link span {
    font-weight: 800;
    font-size: var(--fs-nav);
    line-height: 1.25;
}

.nav-link__underline {
    width: 0.5rem;
    height: 0.25rem;
    background: var(--color-black);
    border-radius: 0.125rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-link:hover .nav-link__underline {
    opacity: 1;
}

/* Hero Section */
.hero {
    position: relative;
    background: var(--color-red);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.hero__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 37.5rem; /* 600px */
    padding: 0 1rem;
    box-sizing: border-box;
}

.hero__cloud-animated {
    width: 100%;
    height: auto;
    aspect-ratio: 680 / 580;
}

/* Cross-Platform Section */
.cross-platform {
    background: var(--color-lavender);
    padding: var(--spacing-xl) 0;
}

.cross-platform__content {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.cross-platform__slideshow {
    flex-shrink: 0;
    width: 31.25rem;
    height: 20rem;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.cross-platform__slide {
    position: absolute;
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    opacity: 0;
}

/* Slide 1: Laptop - slides out to left, fades in */
.cross-platform__slide--1 {
    animation: slideshow-laptop 6.9s infinite;
}

/* Slide 2: Phone - slides in from right, fades out */
.cross-platform__slide--2 {
    animation: slideshow-phone 6.9s infinite;
}

/* Slide 3: Tablet - fade in/out */
.cross-platform__slide--3 {
    animation: slideshow-fade 6.9s infinite;
    animation-delay: 4.6s;
}

@keyframes slideshow-laptop {
    0% {
        opacity: 1;
        transform: translateX(0);
    }
    28.99% {
        opacity: 1;
        transform: translateX(0);
    }
    33.33% {
        opacity: 1;
        transform: translateX(-100%);
    }
    33.34% {
        opacity: 0;
        transform: translateX(0);
    }
    100% {
        opacity: 0;
        transform: translateX(0);
    }
}

@keyframes slideshow-phone {
    0% {
        opacity: 0;
        transform: translateX(100%);
    }
    28.99% {
        opacity: 0;
        transform: translateX(100%);
    }
    33.33% {
        opacity: 1;
        transform: translateX(0);
    }
    62.32% {
        opacity: 1;
        transform: translateX(0);
    }
    66.67% {
        opacity: 0;
        transform: translateX(0);
    }
    100% {
        opacity: 0;
        transform: translateX(100%);
    }
}

@keyframes slideshow-fade {
    0% {
        opacity: 0;
    }
    4.35% {
        opacity: 1;
    }
    28.99% {
        opacity: 1;
    }
    33.33% {
        opacity: 0;
    }
    100% {
        opacity: 0;
    }
}

.cross-platform__text {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* Database Section */
.database {
    background: var(--color-white);
    padding: var(--spacing-xl) 0;
}

.database__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    text-align: center;
}

.database__slideshow {
    width: 32.7rem;
    height: 32.7rem;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.database__slide {
    position: absolute;
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    opacity: 0;
    animation: database-fade 6.9s infinite;
}

.database__slide--1 {
    animation-delay: 0s;
}

.database__slide--2 {
    animation-delay: 2.3s;
}

.database__slide--3 {
    animation-delay: 4.6s;
}

@keyframes database-fade {
    0% {
        opacity: 0;
    }
    4.35% {
        opacity: 1;
    }
    28.99% {
        opacity: 1;
    }
    33.33% {
        opacity: 0;
    }
    100% {
        opacity: 0;
    }
}

.database__text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-width: 50rem;
}

/* Tech Stack Section */
.tech-stack {
    background: var(--color-beige);
    padding: var(--spacing-xl) 0;
}

.tech-stack__content {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.tech-stack__icon {
    flex-shrink: 0;
    width: 31.25rem;
}

.tech-stack__icon img {
    width: 100%;
    height: auto;
}

.tech-stack__text {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
}

.tech-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.tech-list__item strong {
    font-weight: 700;
    font-size: var(--fs-body);
    display: block;
}

.tech-list__item p {
    font-weight: 400;
    font-size: var(--fs-body);
    line-height: 1.5;
    margin-top: 0.25rem;
}

/* Portfolio Section */
.portfolio {
    background: var(--color-grey);
    padding: var(--spacing-xl) 0;
}

.portfolio__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    max-width: 66.25rem;
    margin: var(--spacing-md) auto 0;
}

.project-card {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.project-card__image {
    width: 100%;
    height: 25rem;
    border-radius: var(--radius-md);
    overflow: hidden;
}

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

.project-card__content {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.project-card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.project-card__title {
    font-weight: 800;
    font-size: var(--fs-card-title);
    line-height: 1.25;
    margin: 0;
}

.project-card__year {
    font-weight: 700;
    font-size: var(--fs-body);
    background: var(--color-white);
    padding: 0.25rem 1.25rem;
    border-radius: var(--radius-sm);
}

.project-card__description {
    font-weight: 500;
    font-size: var(--fs-body);
    line-height: 1.5;
    margin: 0;
}

/* Contact Section */
.contact {
    background: var(--color-dark);
    color: var(--color-white);
    padding: var(--spacing-xl) 0 6.25rem;
}

.contact .section-heading {
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.contact__info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.contact__link {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    font-weight: 800;
    font-size: var(--fs-contact-link);
    line-height: 1.25;
}

.contact__link-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
}

.contact__link-underline {
    width: 0.5rem;
    height: 0.25rem;
    background: var(--color-white);
    border-radius: 0.125rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.contact__link:hover .contact__link-underline {
    opacity: 1;
}

.contact__icon {
    width: 3.125rem;
    height: 3.125rem;
    flex-shrink: 0;
}

/* Responsive Design */
@media (max-width: 1024px) {
    :root {
        --fs-heading: 4.5rem;
        --fs-contact-link: 2.5rem;
        --fs-card-title: 1.75rem;
    }

    .cross-platform__content,
    .tech-stack__content {
        gap: var(--spacing-sm);
    }

    .cross-platform__image,
    .tech-stack__icon {
        width: 25rem;
    }
}

@media (max-width: 768px) {
    :root {
        --fs-heading: 3rem;
        --fs-contact-link: 2rem;
        --fs-card-title: 1.5rem;
        --fs-body: 1.125rem;
        --fs-nav: 1rem;
        --spacing-xl: 5rem;
    }

    .header {
        position: relative;
    }

    .header__content {
        flex-direction: column;
        gap: 1.5rem;
    }

    .header__logo {
        text-align: center;
    }

    .header__nav {
        width: 100%;
        justify-content: center;
    }

    .hero {
        height: 100vh;
        min-height: auto;
        padding-top: 0;
        flex-direction: column;
        overflow: hidden;
    }

    .hero__icon {
        max-width: 100%;
        flex: 1;
        min-height: 0;
    }

    .hero__cloud-animated {
        max-height: 100%;
    }

    .cross-platform__content,
    .tech-stack__content {
        flex-direction: column;
    }

    .cross-platform__image,
    .tech-stack__icon {
        width: 100%;
        max-width: 20rem;
    }

    .cross-platform__slideshow {
        width: 100%;
        max-width: 20rem;
        height: 15rem;
    }

    .database__slideshow {
        width: 100%;
        max-width: 20rem;
        height: auto;
        aspect-ratio: 1;
    }

    .portfolio__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .project-card__image {
        height: 20rem;
    }

    .contact__link {
        flex-direction: column;
        text-align: center;
        gap: 0.75rem;
    }
}

@media (max-width: 480px) {
    :root {
        --fs-heading: 2.25rem;
        --fs-contact-link: 1.5rem;
        --fs-card-title: 1.25rem;
        --fs-body: 1rem;
        --container-padding: 1.25rem;
    }

    .header__nav {
        flex-direction: column;
        gap: 1rem;
    }

    .hero {
        min-height: 30rem;
    }

    .project-card__header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}

/* Mobile Floating Navigation */
.mobile-nav-toggle {
    display: none;
}

.mobile-nav-button {
    display: none;
}

.mobile-nav {
    display: none;
}

.mobile-nav-overlay {
    display: none;
}

/* Hide header nav toggle on desktop */
.nav-toggle,
.nav-toggle-label {
    display: none;
}

@media (max-width: 768px) {
    /* Show header nav on mobile */
    .header__nav {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }

    .nav-toggle,
    .nav-toggle-label {
        display: none;
    }

    /* Mobile overlay for closing menu */
    .mobile-nav-overlay {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 998;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
    }

    .mobile-nav-toggle:checked ~ .mobile-nav-overlay {
        opacity: 1;
        visibility: visible;
    }

    /* Mobile floating nav button */
    .mobile-nav-button {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 0.35rem;
        position: fixed;
        bottom: 1.25rem;
        right: 1.25rem;
        width: 3rem;
        height: 3rem;
        background: var(--color-black);
        border-radius: 50%;
        cursor: pointer;
        z-index: 1000;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        transition: transform 0.3s ease, background 0.3s ease;
    }

    .mobile-nav-button:hover {
        transform: scale(1.05);
    }

    .mobile-nav-button span {
        display: block;
        width: 1.25rem;
        height: 2px;
        background: white;
        border-radius: 1px;
        transition: transform 0.3s ease, opacity 0.3s ease;
    }

    /* Animate burger to X when open */
    .mobile-nav-toggle:checked + .mobile-nav-button span:nth-child(1) {
        transform: translateY(0.45rem) rotate(45deg);
    }

    .mobile-nav-toggle:checked + .mobile-nav-button span:nth-child(2) {
        opacity: 0;
    }

    .mobile-nav-toggle:checked + .mobile-nav-button span:nth-child(3) {
        transform: translateY(-0.45rem) rotate(-45deg);
    }

    /* Mobile nav panel */
    .mobile-nav {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 1.25rem;
        position: fixed;
        bottom: 5rem;
        right: 1.25rem;
        background: var(--color-black);
        padding: 1.5rem 2rem;
        border-radius: 1rem;
        box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transform: translateY(1rem) scale(0.9);
        transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
    }

    .mobile-nav-toggle:checked ~ .mobile-nav {
        opacity: 1;
        visibility: visible;
        transform: translateY(0) scale(1);
    }

    .mobile-nav__link {
        font-family: var(--font-heading);
        font-size: 1.125rem;
        font-weight: 700;
        color: white;
        text-decoration: none;
        letter-spacing: 0.05em;
        padding: 0.5rem 1rem;
        border-radius: 0.5rem;
        transition: background 0.3s ease;
    }

    .mobile-nav__link:hover {
        background: rgba(255, 255, 255, 0.1);
    }
}