/* ============================================================
   RUPAM GIRI - Portfolio Stylesheet
   Professional Dark/Light Theme with Clean Colors
   ============================================================ */

/* ========== LIGHT THEME (Default) ========== */
:root,
[data-theme="light"] {
    --color-bg:            #ffffff;
    --color-bg-alt:        #f8f9fb;
    --color-bg-elevated:   #ffffff;
    --color-surface:       #ffffff;
    --color-text:          #0f172a;
    --color-text-secondary:#475569;
    --color-text-muted:    #94a3b8;
    --color-accent:        #2563eb;
    --color-accent-hover:  #1d4ed8;
    --color-accent-subtle: rgba(37, 99, 235, 0.08);
    --color-border:        #e2e8f0;
    --color-border-light:  #f1f5f9;
    --color-tag-bg:        #f1f5f9;
    --color-tag-text:      #334155;
    --color-card-bg:       #ffffff;
    --color-card-hover:    #f8fafc;
    --color-header-bg:     rgba(255, 255, 255, 0.92);
    --color-white:         #ffffff;
    --color-success:       #16a34a;
    --color-error:         #dc2626;
    --shadow-color:        220 13% 69%;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs:   0.75rem;
    --font-size-sm:   0.875rem;
    --font-size-base: 1rem;
    --font-size-md:   1.125rem;
    --font-size-lg:   1.25rem;
    --font-size-xl:   1.5rem;
    --font-size-2xl:  2rem;
    --font-size-3xl:  2.75rem;
    --font-size-4xl:  3.25rem;

    /* Spacing */
    --spacing-xs:  0.25rem;
    --spacing-sm:  0.5rem;
    --spacing-md:  1rem;
    --spacing-lg:  1.5rem;
    --spacing-xl:  2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;

    /* Layout */
    --container-max: 1120px;
    --header-height: 72px;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-xs: 0 1px 2px hsl(var(--shadow-color) / 0.04);
    --shadow-sm: 0 1px 3px hsl(var(--shadow-color) / 0.06), 0 1px 2px hsl(var(--shadow-color) / 0.04);
    --shadow-md: 0 4px 6px hsl(var(--shadow-color) / 0.06), 0 2px 4px hsl(var(--shadow-color) / 0.04);
    --shadow-lg: 0 10px 25px hsl(var(--shadow-color) / 0.08), 0 4px 10px hsl(var(--shadow-color) / 0.04);
    --shadow-xl: 0 20px 50px hsl(var(--shadow-color) / 0.12);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition: 0.3s ease;
    --transition-slow: 0.5s ease;
}


/* ========== DARK THEME ========== */
[data-theme="dark"] {
    --color-bg:            #0f172a;
    --color-bg-alt:        #1e293b;
    --color-bg-elevated:   #1e293b;
    --color-surface:       #1e293b;
    --color-text:          #f1f5f9;
    --color-text-secondary:#94a3b8;
    --color-text-muted:    #64748b;
    --color-accent:        #3b82f6;
    --color-accent-hover:  #60a5fa;
    --color-accent-subtle: rgba(59, 130, 246, 0.12);
    --color-border:        #334155;
    --color-border-light:  #1e293b;
    --color-tag-bg:        #334155;
    --color-tag-text:      #cbd5e1;
    --color-card-bg:       #1e293b;
    --color-card-hover:    #263548;
    --color-header-bg:     rgba(15, 23, 42, 0.92);
    --color-white:         #f1f5f9;
    --shadow-color:        222 47% 8%;
}


/* ========== 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-family);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition), color var(--transition);
}

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;
}

ul {
    list-style: none;
}

strong {
    font-weight: 600;
    color: var(--color-text);
}

::selection {
    background-color: var(--color-accent);
    color: #ffffff;
}


/* ========== UTILITY CLASSES ========== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.section {
    padding: var(--spacing-4xl) 0;
    transition: background-color var(--transition);
}

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

.section__label {
    display: block;
    text-align: center;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

.section__title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
    position: relative;
    padding-bottom: var(--spacing-lg);
}

.section__title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 48px;
    height: 3px;
    background-color: var(--color-accent);
    border-radius: 2px;
}

.section__subtitle {
    text-align: center;
    color: var(--color-text-secondary);
    max-width: 580px;
    margin: 0 auto var(--spacing-3xl);
    font-size: var(--font-size-md);
    line-height: 1.8;
}


/* ========== BUTTONS ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.7rem 1.6rem;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 500;
    letter-spacing: 0.01em;
    border-radius: var(--radius-sm);
    border: 1.5px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

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

.btn--primary:hover {
    background-color: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

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

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

.btn--ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: transparent;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

.btn--ghost:hover {
    color: var(--color-accent);
    background: var(--color-accent-subtle);
}

.btn--full {
    width: 100%;
}


/* ========== THEME TOGGLE ========== */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: var(--color-accent-subtle);
}

[data-theme="light"] .theme-toggle__moon {
    display: none;
}

[data-theme="dark"] .theme-toggle__sun {
    display: none;
}


/* ========== HEADER / NAVIGATION ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--color-header-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    z-index: 1000;
    transition: border-color var(--transition), box-shadow var(--transition), background-color var(--transition);
}

.header--scrolled {
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

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

.nav__logo {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

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

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

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

.nav__link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    position: relative;
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav__link:hover,
.nav__link.active {
    color: var(--color-accent);
    background-color: var(--color-accent-subtle);
}

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

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

.nav__toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--color-text);
    border-radius: 1px;
    transition: all var(--transition);
}


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

.hero__container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero__greeting {
    font-size: var(--font-size-md);
    color: var(--color-text-muted);
    font-weight: 400;
    margin-bottom: var(--spacing-sm);
}

.hero__name {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.hero__title {
    font-size: var(--font-size-xl);
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: var(--spacing-lg);
}

.hero__description {
    font-size: var(--font-size-md);
    color: var(--color-text-secondary);
    line-height: 1.8;
    max-width: 500px;
    margin-bottom: var(--spacing-xl);
}

/* Stats */
.hero__stats {
    display: flex;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.hero__stat {
    text-align: center;
}

.hero__stat-number {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
}

.hero__stat-plus {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-accent);
}

.hero__stat-label {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 500;
}

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

/* Hero Image */
.hero__image {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.hero__image-wrapper {
    position: relative;
    width: 300px;
    height: 300px;
}

.hero__image-wrapper::before {
    content: '';
    position: absolute;
    inset: -10px;
    border: 2px solid var(--color-border);
    border-radius: 50%;
    animation: pulse-ring 3s ease-in-out infinite;
}

@keyframes pulse-ring {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.02); }
}

.hero__image-placeholder {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: var(--color-bg-alt);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    font-weight: 800;
    color: var(--color-accent);
    letter-spacing: -0.02em;
    border: 2px solid var(--color-border);
    overflow: hidden;
    transition: background-color var(--transition), border-color var(--transition);
}

.hero__image-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero__image-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.5rem 1rem;
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    box-shadow: var(--shadow-sm);
    transition: background-color var(--transition), border-color var(--transition);
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: var(--color-success);
    border-radius: 50%;
    animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}


/* ========== ABOUT SECTION ========== */
.about__content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-3xl);
    margin-top: var(--spacing-2xl);
}

.about__text p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.about__text p:last-child {
    margin-bottom: 0;
}

.about__details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.about__detail-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.about__detail-item:hover {
    background-color: var(--color-accent-subtle);
}

.about__detail-icon {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    background: var(--color-accent-subtle);
    border-radius: var(--radius-sm);
}

.about__detail-label {
    display: block;
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 2px;
}

.about__detail-value {
    color: var(--color-text);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.about__detail-value a {
    color: var(--color-text-secondary);
}

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

/* Social Buttons in About */
.about__social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.about__social-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.5rem 1rem;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.about__social-btn:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: var(--color-accent-subtle);
}


/* ========== SKILLS SECTION ========== */
.skills__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.skill-card {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    transition: all var(--transition-fast);
}

.skill-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.skill-card__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-subtle);
    color: var(--color-accent);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.skill-card__title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.skill-card__desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.skill-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tag {
    display: inline-block;
    padding: 0.3rem 0.75rem;
    background-color: var(--color-tag-bg);
    color: var(--color-tag-text);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.tag:hover {
    background-color: var(--color-accent-subtle);
    color: var(--color-accent);
}


/* ========== PROJECTS SECTION ========== */
.projects__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.project-card {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background-color: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

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

.project-card:hover::before {
    transform: scaleX(1);
}

.project-card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.project-card__folder {
    color: var(--color-accent);
}

.project-card__links {
    display: flex;
    gap: var(--spacing-md);
}

.project-card__links a {
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

.project-card__date {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.project-card__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
    color: var(--color-text);
}

.project-card__description {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.project-card__features {
    list-style: none;
    margin-bottom: var(--spacing-xl);
    flex-grow: 1;
}

.project-card__features li {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    padding: 0.25rem 0;
    padding-left: var(--spacing-lg);
    position: relative;
}

.project-card__features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 6px;
    height: 6px;
    background-color: var(--color-accent);
    border-radius: 50%;
    transform: translateY(-50%);
}

.project-card__tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-top: auto;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.project-card__tech li {
    font-size: var(--font-size-xs);
    color: var(--color-accent);
    font-weight: 500;
}


/* ========== EDUCATION / TIMELINE ========== */
.timeline {
    position: relative;
    max-width: 720px;
    margin: var(--spacing-2xl) auto 0;
    padding-left: var(--spacing-2xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 10px;
    bottom: 10px;
    width: 2px;
    background-color: var(--color-border);
}

.timeline__item {
    position: relative;
    padding-bottom: var(--spacing-2xl);
}

.timeline__item:last-child {
    padding-bottom: 0;
}

.timeline__marker {
    position: absolute;
    left: calc(-1 * var(--spacing-2xl) + 1px);
    top: 10px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--color-accent);
    border: 3px solid var(--color-bg-alt);
    box-shadow: 0 0 0 2px var(--color-accent);
    transition: background-color var(--transition), border-color var(--transition);
}

.timeline__content {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    transition: all var(--transition-fast);
}

.timeline__content:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent);
}

.timeline__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.timeline__title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
}

.timeline__date {
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-accent);
    white-space: nowrap;
    padding: 0.2rem 0.7rem;
    background-color: var(--color-accent-subtle);
    border-radius: var(--radius-full);
}

.timeline__institution {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
}

.timeline__detail {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-weight: 500;
}

.timeline__extra {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
    line-height: 1.6;
}


/* ========== CONTACT SECTION ========== */
.contact__grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: var(--spacing-3xl);
}

.contact__info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.contact__item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.contact__item:hover {
    background-color: var(--color-accent-subtle);
}

.contact__icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-accent-subtle);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-accent);
    transition: all var(--transition-fast);
}

.contact__item:hover .contact__icon {
    background-color: var(--color-accent);
    color: #ffffff;
    border-color: var(--color-accent);
}

.contact__item h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: 2px;
    color: var(--color-text);
}

.contact__item a,
.contact__item p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

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

/* Form */
.contact__form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    transition: background-color var(--transition), border-color var(--transition);
}

.form__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.form__label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.form__input {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    color: var(--color-text);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition);
}

.form__input::placeholder {
    color: var(--color-text-muted);
}

.form__input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.form__textarea {
    resize: vertical;
    min-height: 130px;
}


/* ========== FOOTER ========== */
.footer {
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--color-border);
    background-color: var(--color-bg-alt);
    transition: background-color var(--transition), border-color var(--transition);
}

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

.footer__left {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.footer__logo {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-text);
}

.footer__logo span {
    color: var(--color-accent);
}

.footer__logo:hover {
    color: var(--color-text);
}

.footer__tagline {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.footer__center {}

.footer__text {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.footer__socials {
    display: flex;
    gap: var(--spacing-md);
}

.footer__socials a {
    color: var(--color-text-muted);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.footer__socials a:hover {
    color: var(--color-accent);
    background: var(--color-accent-subtle);
}


/* ========== BACK TO TOP ========== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-accent);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition);
    z-index: 99;
    box-shadow: var(--shadow-md);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--color-accent-hover);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
}


/* ========== ANIMATIONS ========== */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger animation for skill cards */
.skill-card.fade-in:nth-child(1) { transition-delay: 0s; }
.skill-card.fade-in:nth-child(2) { transition-delay: 0.1s; }
.skill-card.fade-in:nth-child(3) { transition-delay: 0.2s; }
.skill-card.fade-in:nth-child(4) { transition-delay: 0.3s; }
.skill-card.fade-in:nth-child(5) { transition-delay: 0.4s; }
.skill-card.fade-in:nth-child(6) { transition-delay: 0.5s; }

.project-card.fade-in:nth-child(1) { transition-delay: 0s; }
.project-card.fade-in:nth-child(2) { transition-delay: 0.15s; }
.project-card.fade-in:nth-child(3) { transition-delay: 0.3s; }


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

/* Tablet */
@media (max-width: 968px) {
    :root {
        --font-size-4xl: 2.5rem;
        --font-size-3xl: 2rem;
    }

    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-2xl);
    }

    .hero__content {
        order: 2;
    }

    .hero__image {
        order: 1;
    }

    .hero__description {
        margin-left: auto;
        margin-right: auto;
    }

    .hero__stats {
        justify-content: center;
    }

    .hero__actions {
        justify-content: center;
    }

    .hero__image-wrapper {
        width: 240px;
        height: 240px;
    }

    .about__content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .skills__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .projects__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
}

/* Mobile */
@media (max-width: 640px) {
    :root {
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
        --font-size-2xl: 1.375rem;
        --spacing-4xl: 4rem;
    }

    .container {
        padding: 0 var(--spacing-lg);
    }

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

    .nav__menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background-color: var(--color-header-bg);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        flex-direction: column;
        padding: var(--spacing-xl);
        gap: var(--spacing-sm);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-120%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition);
        z-index: 999;
    }

    .nav__menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav__toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav__toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav__toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero {
        min-height: auto;
        padding-top: calc(var(--header-height) + var(--spacing-3xl));
        padding-bottom: var(--spacing-3xl);
    }

    .hero__image-wrapper {
        width: 180px;
        height: 180px;
    }

    .hero__stats {
        gap: var(--spacing-xl);
    }

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

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

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

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

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

    .timeline {
        padding-left: var(--spacing-xl);
    }

    .timeline__header {
        flex-direction: column;
    }

    .footer__container {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }

    .footer__left {
        align-items: center;
    }

    .about__social-links {
        justify-content: center;
    }
}