@import url('https://fonts.googleapis.com/css2?family=Cabin:wght@400;500;600;700&family=Literata:opsz,wght@7..72,500;7..72,700&display=swap');

:root {
    --bg-primary: #f3ede3;
    --bg-secondary: #fbf7f1;
    --surface: #fffdf9;
    --text-primary: #2f2923;
    --text-secondary: #66584b;
    --accent-color: #b55332;
    --accent-hover: #9f4526;
    --accent-soft: rgba(181, 83, 50, 0.12);
    --border-color: rgba(47, 41, 35, 0.17);
    --muted-line: rgba(47, 41, 35, 0.09);
    --header-bg: linear-gradient(145deg, #3a2e25 0%, #524233 52%, #7a5f45 100%);
    --nav-bg: rgba(251, 247, 241, 0.92);
    --card-shadow: 0 16px 30px rgba(53, 43, 33, 0.15);
    --success-bg: #dff3e1;
    --success-text: #1e6a34;
    --success-border: #a2d9ac;
    --error-bg: #fce5e6;
    --error-text: #8a323c;
    --error-border: #f4b5bc;
    --radius-lg: 20px;
    --radius-md: 14px;
    --transition: 220ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme='dark'] {
    --bg-primary: #161311;
    --bg-secondary: #201a16;
    --surface: #25201c;
    --text-primary: #f0e8dd;
    --text-secondary: #cab9a4;
    --accent-color: #e58f4c;
    --accent-hover: #f1a669;
    --accent-soft: rgba(229, 143, 76, 0.2);
    --border-color: rgba(240, 232, 221, 0.2);
    --muted-line: rgba(240, 232, 221, 0.1);
    --header-bg: linear-gradient(140deg, #100d0a 0%, #2a211b 56%, #553a22 100%);
    --nav-bg: rgba(30, 24, 20, 0.9);
    --card-shadow: 0 18px 34px rgba(0, 0, 0, 0.42);
    --success-bg: #1f3f28;
    --success-text: #9be5b0;
    --success-border: #3e8453;
    --error-bg: #472329;
    --error-text: #f7c2c9;
    --error-border: #884752;
}

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

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    font-family: 'Cabin', 'Segoe UI', sans-serif;
    color: var(--text-primary);
    line-height: 1.7;
    letter-spacing: 0.01em;
    background: var(--bg-primary);
    transition: background-color var(--transition), color var(--transition);
    overflow-x: hidden;
}

body::before,
body::after {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: -2;
}

body::before {
    background:
        radial-gradient(900px 600px at 10% 8%, rgba(181, 83, 50, 0.12) 0%, transparent 70%),
        radial-gradient(800px 640px at 98% 85%, rgba(61, 123, 95, 0.14) 0%, transparent 72%);
}

body::after {
    z-index: -1;
    background-image: linear-gradient(var(--muted-line) 1px, transparent 1px), linear-gradient(90deg, var(--muted-line) 1px, transparent 1px);
    background-size: 56px 56px;
    opacity: 0.45;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 3px solid var(--accent-color);
    outline-offset: 3px;
}

.container {
    width: min(1140px, calc(100% - 2.4rem));
    margin-inline: auto;
}

.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1200;
}

#themeToggle {
    width: 3rem;
    height: 3rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--nav-bg);
    color: var(--text-primary);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.18);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.15rem;
    transition: transform var(--transition), border-color var(--transition), background-color var(--transition);
    backdrop-filter: blur(10px);
}

#themeToggle:hover {
    transform: translateY(-2px);
}

header {
    background: var(--header-bg);
    color: #f9f2ea;
    position: relative;
    overflow: hidden;
    padding: clamp(5.5rem, 10vw, 7.4rem) 0 clamp(3.6rem, 6.8vw, 4.9rem);
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 8px;
    background: linear-gradient(90deg, transparent 0%, rgba(255, 226, 181, 0.85) 48%, transparent 100%);
}

header::after {
    content: '';
    position: absolute;
    right: -14%;
    bottom: -40%;
    width: min(560px, 64vw);
    height: min(560px, 64vw);
    border-radius: 999px;
    background: radial-gradient(circle, rgba(255, 214, 150, 0.3) 0%, transparent 72%);
}

header .container {
    position: relative;
    z-index: 1;
}

header h1 {
    font-family: 'Literata', Georgia, serif;
    font-size: clamp(2.3rem, 5vw, 3.8rem);
    line-height: 1.08;
    letter-spacing: 0.01em;
    max-width: 18ch;
    margin-bottom: 0.7rem;
}

header .subtitle {
    max-width: 44ch;
    font-size: clamp(1rem, 2.3vw, 1.25rem);
    color: rgba(249, 242, 234, 0.93);
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

nav {
    position: sticky;
    top: 0;
    z-index: 900;
    background: var(--nav-bg);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.nav-links {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem 0;
}

.nav-links a {
    text-decoration: none;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.11em;
    font-size: 0.78rem;
    color: var(--text-secondary);
    border-radius: 7px;
    padding: 0.62rem 0.92rem;
    border: 1px solid transparent;
    transition: color var(--transition), background-color var(--transition), border-color var(--transition), transform var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
    background: var(--accent-soft);
    border-color: rgba(181, 83, 50, 0.32);
    transform: translateY(-1px);
}

main {
    margin-top: -1.4rem;
    padding: 0 0 4rem;
    display: grid;
    gap: 1.5rem;
}

.section {
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: clamp(1.1rem, 2.7vw, 2rem);
    box-shadow: var(--card-shadow);
    position: relative;
    overflow: hidden;
}

.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color) 0%, transparent 90%);
}

.section h2 {
    font-family: 'Literata', Georgia, serif;
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    line-height: 1.12;
    margin-bottom: 1.15rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.section h2::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--accent-color) 0%, transparent 90%);
}

.about-content {
    columns: 2;
    column-gap: 2rem;
}

.about-content p {
    font-size: 1.1rem;
    text-align: justify;
    text-justify: inter-word;
    hyphens: auto;
    margin-bottom: 1rem;
    break-inside: avoid;
}

#experience .section-inner,
#certificates .section-inner {
    display: block;
}

.experience-item,
.certificate-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 20px rgba(42, 34, 27, 0.08);
    padding: clamp(1rem, 2.3vw, 1.4rem);
    margin-bottom: 1rem;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.experience-item:hover,
.certificate-item:hover {
    transform: translateY(-2px);
    border-color: rgba(181, 83, 50, 0.36);
    box-shadow: 0 14px 22px rgba(42, 34, 27, 0.14);
}

.experience-header,
.certificate-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.8rem;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
}

.experience-header h3,
.certificate-title-group h3 {
    font-family: 'Literata', Georgia, serif;
    font-size: clamp(1.15rem, 2.2vw, 1.45rem);
    line-height: 1.25;
}

.company,
.certificate-org {
    color: var(--text-secondary);
    font-weight: 600;
    margin-top: 0.2rem;
}

.duration,
.certificate-date {
    border: 1px solid var(--border-color);
    border-radius: 999px;
    background: var(--surface);
    color: var(--text-secondary);
    padding: 0.28rem 0.72rem;
    font-size: 0.83rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    white-space: nowrap;
}

.project-info {
    margin-bottom: 0.38rem;
}

.project-info strong {
    color: var(--text-secondary);
}

.responsibilities {
    list-style: none;
    margin-top: 0.75rem;
    border-left: 2px solid var(--muted-line);
    padding-left: 0.85rem;
}

.responsibilities li {
    position: relative;
    margin-bottom: 0.45rem;
    padding-left: 1rem;
}

.responsibilities li::before {
    content: '';
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 999px;
    position: absolute;
    top: 0.6rem;
    left: 0;
    background: var(--accent-color);
}

.sub-project {
    margin-top: 0.95rem;
    padding-top: 0.9rem;
    border-top: 1px dashed var(--border-color);
}

.sub-project:first-child {
    margin-top: 0.3rem;
    padding-top: 0.2rem;
    border-top: 0;
}

.certificate-details {
    margin-top: 0.32rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.certificate-link {
    margin-top: 0.7rem;
}

.certificate-link a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-primary);
    background: var(--accent-soft);
    border: 1px solid rgba(181, 83, 50, 0.36);
    border-radius: 999px;
    font-weight: 700;
    padding: 0.45rem 0.9rem;
    transition: transform var(--transition), background-color var(--transition);
}

.certificate-link a:hover {
    transform: translateX(2px);
    background: rgba(181, 83, 50, 0.2);
}

.contact-content {
    display: grid;
    grid-template-columns: 1.25fr 0.75fr;
    gap: clamp(1rem, 2.5vw, 1.5rem);
}

.contact-intro {
    grid-column: 1 / -1;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    padding: 0.95rem 1rem;
}

.contact-intro p {
    color: var(--text-secondary);
}

.contact-form {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    padding: clamp(0.95rem, 2.2vw, 1.25rem);
}

.form-group {
    margin-bottom: 0.92rem;
}

.form-group label {
    display: block;
    color: var(--text-secondary);
    font-weight: 700;
    font-size: 0.92rem;
    margin-bottom: 0.3rem;
    letter-spacing: 0.03em;
}

.form-group input,
.form-group textarea {
    width: 100%;
    border: 1px solid var(--border-color);
    background: var(--surface);
    color: var(--text-primary);
    border-radius: 10px;
    padding: 0.68rem 0.8rem;
    font: inherit;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.78;
}

.form-group textarea {
    resize: vertical;
    min-height: 128px;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px var(--accent-soft);
}

.submit-btn {
    width: 100%;
    border: 0;
    border-radius: 10px;
    padding: 0.78rem 1rem;
    background: linear-gradient(120deg, var(--accent-color), var(--accent-hover));
    color: #fff8f2;
    font: inherit;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
}

.submit-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 14px 24px rgba(21, 15, 11, 0.24);
}

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

.submit-btn:disabled {
    opacity: 0.72;
    cursor: not-allowed;
}

.form-status {
    display: none;
    margin-top: 0.8rem;
    border: 1px solid transparent;
    border-radius: 10px;
    padding: 0.65rem 0.76rem;
    text-align: center;
    font-weight: 600;
    font-size: 0.92rem;
}

.form-status.success {
    display: block;
    background: var(--success-bg);
    color: var(--success-text);
    border-color: var(--success-border);
}

.form-status.error {
    display: block;
    background: var(--error-bg);
    color: var(--error-text);
    border-color: var(--error-border);
}

.social-links {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    padding: clamp(0.95rem, 2.2vw, 1.25rem);
}

.social-links h3 {
    font-family: 'Literata', Georgia, serif;
    font-size: 1.35rem;
    margin-bottom: 0.75rem;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.62rem;
    text-decoration: none;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--surface);
    padding: 0.72rem 0.8rem;
    transition: border-color var(--transition), transform var(--transition);
}

.contact-item:hover {
    border-color: rgba(181, 83, 50, 0.38);
    transform: translateX(2px);
}

.contact-icon {
    font-size: 1.2rem;
}

.contact-item span:last-child {
    font-weight: 700;
}

footer {
    margin-top: 2.5rem;
    text-align: center;
    padding: 1.7rem 0 2.2rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

@media (max-width: 1050px) {
    .about-content {
        columns: 1;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 780px) {
    .theme-toggle {
        top: 0.75rem;
        right: 0.75rem;
    }

    #themeToggle {
        width: 2.75rem;
        height: 2.75rem;
        font-size: 1.02rem;
    }

    header {
        padding-top: 5.1rem;
    }

    nav .container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
    }

    .nav-links {
        width: max-content;
        margin-inline: auto;
        gap: 0.35rem;
        padding: 0.58rem 0;
    }

    .nav-links a {
        font-size: 0.72rem;
        letter-spacing: 0.08em;
        padding: 0.55rem 0.8rem;
    }

    main {
        margin-top: -1.05rem;
    }

    .section {
        border-radius: 16px;
        padding: 0.95rem;
    }

    .duration,
    .certificate-date {
        white-space: normal;
    }

    .certificate-link a {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 540px) {
    .container {
        width: calc(100% - 1.15rem);
    }

    .section h2 {
        font-size: 1.55rem;
    }

    .about-content p {
        font-size: 1.02rem;
    }

    .experience-item,
    .certificate-item,
    .contact-form,
    .social-links,
    .contact-intro {
        padding: 0.86rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .experience-item:hover,
    .certificate-item:hover,
    .contact-item:hover,
    .submit-btn:hover,
    .nav-links a:hover,
    .nav-links a.active,
    #themeToggle:hover {
        transform: none;
    }
}

@media print {
    .theme-toggle,
    nav {
        display: none;
    }

    body,
    .section,
    .experience-item,
    .certificate-item,
    .contact-intro,
    .contact-form,
    .social-links {
        background: #fff !important;
        color: #000 !important;
        box-shadow: none !important;
    }

    .section,
    .experience-item,
    .certificate-item,
    .contact-intro,
    .contact-form,
    .social-links {
        border: 1px solid #ccc !important;
    }

    .experience-item,
    .certificate-item {
        break-inside: avoid;
        page-break-inside: avoid;
    }

    a {
        color: #000 !important;
        text-decoration: underline;
    }
}