:root {
    /* LIGHT MODE PALETTE */
    --bg-primary: #ffffff;
    --bg-secondary: #f4fcfa;
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --brand-green: #34d399;
    --brand-green-dark: #059669;
    --border-color: #e5e7eb;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    --error-color: #ef4444;
    --error-bg: #fef2f2;

    /* GLOBAL */
    --font-main: 'Outfit', sans-serif;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

/* DARK MODE */
body.dark-mode {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --brand-green: #10b981;
    --brand-green-dark: #34d399;
    --border-color: #334155;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.05);
    --error-color: #f87171;
    --error-bg: rgba(239, 68, 68, 0.1);
}

/* RESET & BASE */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition), color var(--transition);
}

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

ul {
    list-style: none;
}

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

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

/* HEADER */

#main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    position: sticky;
    top: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

/* BRAND */
.brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.green-circle {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--brand-green), var(--brand-green-dark));
    box-shadow: 0 0 10px rgba(52, 211, 153, 0.4);
    flex-shrink: 0;
}

.brand-text {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0.75rem;
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.brand-tagline {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-left: 1px solid var(--border-color);
    padding-left: 0.75rem;
    line-height: 1.4;
}

/* HEADER RIGHT SECTION */
.header-right {
    display: flex;
    align-items: center;
    gap: 2rem;
}

/* NAVIGATION */
nav ul {
    display: flex;
    gap: 1.5rem;
}

nav a {
    font-size: 0.95rem;
    font-weight: 600;
    position: relative;
}

nav a:hover {
    color: var(--brand-green);
}

nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--brand-green);
    transition: width var(--transition);
}

nav a:hover::after {
    width: 100%;
}

/* CONTROLS */
.controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.control-btn {
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition);
    min-width: 40px;
    min-height: 40px;
}

.control-btn:hover {
    background-color: var(--bg-secondary);
}

.control-btn:focus-visible {
    outline: 2px solid var(--brand-green);
    outline-offset: 2px;
}

#theme-icon {
    width: 20px;
    height: 20px;
}

/* LANGUAGE SELECTOR */

.lang-selector {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    gap: 0.5rem;
}

.flag-icon {
    width: 28px;
    height: 19px;
    object-fit: cover;
    border-radius: 2px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

/* LANGUAGE DROPDOWN */
.dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    min-width: 160px;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
    transform: translateY(0);
    z-index: 1001;
}

.dropdown.hidden {
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    pointer-events: none;
}

/* DROPDOWN ARROW */
.dropdown::before {
    content: '';
    position: absolute;
    top: -6px;
    right: 12px;
    width: 12px;
    height: 12px;
    background-color: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    border-top: 1px solid var(--border-color);
    transform: rotate(45deg);
    z-index: -1;
}

.dropdown li {
    padding: 0.75rem 1rem;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: background-color var(--transition);
    border-bottom: 1px solid var(--border-color);
}

.dropdown li:last-child {
    border-bottom: none;
}

.dropdown li:hover,
.dropdown li:focus {
    background-color: var(--brand-green);
    color: #fff;
}

.dropdown li span {
    font-weight: 500;
}

/* HERO SECTION */

.hero-section {
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 5%;
}

.hero-content {
    max-width: 1200px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
}

.hero-text {
    flex: 1;
}

.greeting {
    color: var(--brand-green);
    font-weight: 600;
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.hero-name {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* PROFILE IMAGE */
.hero-image-wrapper {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.wave-container {
    position: relative;
    width: min(400px, 90vw);
    height: min(400px, 90vw);
    display: flex;
    align-items: center;
    justify-content: center;
}

.wave-container::before {
    content: '';
    position: absolute;
    width: 120%;
    height: 120%;
    background: var(--brand-green);
    border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%;
    animation: morph 4s ease-in-out infinite alternate;
    z-index: -1;
    top: -10%;
    left: -10%;
    opacity: 0.8;
}

@keyframes morph {
    0% {
        border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%;
    }

    100% {
        border-radius: 60% 40% 30% 70% / 60% 50% 40% 50%;
    }
}

.profile-photo {
    width: 90%;
    height: 90%;
    object-fit: cover;
    border-radius: 50%;
    box-shadow: var(--shadow-md);
    transition: border-radius 0.25s ease;
}

.wave-container:hover .profile-photo {
    transform: scale(1.05);
    border-radius: 45%;
}

/* BUTTONS */

.btn {
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    height: 3rem;
    width: 12.5rem;
}

.btn.primary {
    background-color: var(--brand-green);
    color: #fff;
    border: 2px solid var(--brand-green);
}

.btn.primary:hover {
    background-color: var(--brand-green-dark);
    border-color: var(--brand-green-dark);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn.secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn.secondary:hover {
    border-color: var(--brand-green);
    color: var(--brand-green);
}

.btn.outline {
    border: 2px solid var(--brand-green);
    color: var(--brand-green);
    background: transparent;
    padding: 0.5rem 1rem;
    border-radius: 6px;
}

.btn.outline:hover {
    background: var(--brand-green);
    color: #fff;
}

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

/* SECTIONS GENERAL */

section {
    padding: 6rem 5%;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--brand-green);
    margin: 1rem auto 0;
    border-radius: 2px;
}

/* PORTFOLIO SECTION */

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

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.project-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.project-logo {
    height: 80px;
    margin-bottom: 1.5rem;
}

.project-logo img {
    height: 100%;
    object-fit: contain;
}

.holding-card {
    border-top: 4px solid var(--brand-green);
}

.badge {
    font-size: 0.75rem;
    background: var(--brand-green);
    color: white;
    padding: 0.2rem 0.5rem;
    border-radius: 12px;
    vertical-align: middle;
    margin-left: 0.5rem;
    font-weight: 600;
}

.subsidiaries {
    display: flex;
    gap: 1.5rem;
    margin: 1.5rem 0;
    align-items: center;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

.sub-logo {
    height: 30px;
    opacity: 0.8;
    transition: opacity var(--transition);
}

.sub-logo:hover {
    opacity: 1;
}

.project-info h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.project-desc {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* LANGUAGES SECTION */

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

.languages-container {
    max-width: 75%;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    flex-direction: row;
    gap: 1.5rem;
}

.language-item {
    background: var(--bg-secondary);
    display: flexbox;
    gap: 0.5rem;
    padding: 1rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    max-width: 600px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition);
}

.language-item:hover {
    border-color: var(--brand-green);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.language-header {
    display: flex;
    padding-bottom: 1rem;
    justify-content: space-between;
    align-items: center;
    font-size: 1.1rem;
    font-weight: 600;
}

.language-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.language-name {
    color: var(--text-primary);
}

.language-level {
    color: var(--text-secondary);
    font-weight: 500;
}

.language-bar {
    width: 100%;
}

.language-blocks {
    display: flex;
    gap: 4px;
    height: 12px;
}

.block {
    flex: 1;
    background-color: var(--border-color);
    border-radius: 2px;
    transition: background-color var(--transition);
}

.block.filled {
    background-color: var(--brand-green);
}

body.dark-mode .block.filled {
    background-color: var(--brand-green);
}

/* ABOUT SECTION */

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

.about-container {
    max-width: 1200px;
    margin: 0 auto;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.about-card {
    background: var(--bg-secondary);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: transform var(--transition), box-shadow var(--transition);
}

.about-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--brand-green);
}

.about-card-icon {
    width: 60px;
    height: 60px;
    background: var(--brand-green);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    box-shadow: 0 4px 10px rgba(52, 211, 153, 0.3);
}

.about-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.about-card p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

/* CONSULTANCY SECTION */

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

.consultancy-card {
    max-width: 600px;
    margin: 0 auto;
    background: var(--bg-primary);
    padding: 3rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.consultancy-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* FORM */
.proposal-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-input {
    resize: vertical;
}

.form-row {
    display: flex;
    gap: 1rem;
}

.form-group.half {
    flex: 1;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.25rem;
    font-size: 0.95rem;
}

.form-input {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--transition), box-shadow var(--transition), background-color var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--brand-green);
    box-shadow: 0 0 0 3px rgba(52, 211, 153, 0.1);
}

.form-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

/* PHONE INPUT REFACTOR */
.phone-input-container {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.phone-input-container .country-code {
    flex: 0 0 80px;
    text-align: center;
}

.phone-input-container .state-number {
    flex: 0 0 80px;
    text-align: center;
}

.phone-input-container .main-number {
    flex: 1;
}

/* ERROR STATE */
.form-input.error {
    border-color: var(--error-color);
    background-color: var(--error-bg);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-input.error:focus {
    border-color: var(--error-color);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}

/* CHECKBOX STYLING */
.checkbox-group {
    margin-bottom: 0.5rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-weight: 500;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    flex-shrink: 0;
}

.checkbox-label input[type="checkbox"]:checked+.checkmark {
    background-color: var(--brand-green);
    border-color: var(--brand-green);
}

.checkmark::after {
    content: '';
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg) scale(0);
    transition: transform 0.2s ease;
}

.checkbox-label input[type="checkbox"]:checked+.checkmark::after {
    transform: rotate(45deg) scale(1);
}

.checkbox-label:hover .checkmark {
    border-color: var(--brand-green);
}

/* HIDDEN FIELDS */
.hidden {
    display: none !important;
}

.name-fields.hidden {
    opacity: 0;
    pointer-events: none;
}


@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* FORM FEEDBACK */
#form-feedback {
    margin-top: 1rem;
    color: var(--brand-green);
    font-weight: 600;
    text-align: center;
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    background: rgba(52, 211, 153, 0.1);
}

#form-feedback.hidden {
    display: none;
}

#form-feedback.error {
    color: var(--error-color);
    background: var(--error-bg);
}

/* FOOTER */

#main-footer {
    background-color: var(--bg-secondary);
    padding: 3rem 5%;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr) auto;
    gap: 2rem;
    align-items: start;
}

/* CONTACT COLUMNS */
.footer-col.contact-col {
    display: flex;
    flex-direction: column;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.contact-item svg {
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--brand-green);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.contact-info h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0;
}

.contact-info a {
    font-size: 0.95rem;
    color: var(--text-primary);
    font-weight: 500;
    transition: color var(--transition);
    word-break: break-all;
}

.contact-info a:hover {
    color: var(--brand-green);
}

/* COPYRIGHT COLUMN */
.copyright-col {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    text-align: right;
}

.copyright-col p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

/* RESPONSIVE DESIGN */

@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }

    .copyright-col {
        grid-column: 1 / -1;
        justify-content: center;
        text-align: center;
        padding-top: 1rem;
        border-top: 1px solid var(--border-color);
    }
}

@media (max-width: 900px) {
    .header-right nav {
        display: none;
    }

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

    .brand-tagline {
        border-left: none;
        padding-left: 0;
        font-size: 0.7rem;
    }

    .hero-content {
        flex-direction: column-reverse;
        text-align: center;
        gap: 3rem;
    }

    .hero-actions {
        justify-content: center;
    }

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

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .contact-item {
        align-items: center;
    }

    .contact-info {
        align-items: center;
        text-align: center;
    }

    .copyright-col {
        justify-content: center;
        text-align: center;
    }

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

    .languages-container {
        padding: 0 1rem;
    }
}

@media (max-width: 600px) {
    #main-header {
        padding: 1rem 4%;
    }

    .brand-tagline {
        display: none;
    }

    .hero-name {
        font-size: 2rem;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }

    .wave-container {
        width: 280px;
        height: 280px;
    }

    .consultancy-card {
        padding: 2rem 1.5rem;
    }

    section {
        padding: 4rem 4%;
    }

    .language-blocks {
        height: 10px;
    }
}

/* REDUCED MOTION */
@media (prefers-reduced-motion: reduce) {

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

    html {
        scroll-behavior: auto;
    }
}

/* FOCUS VISIBLE FOR ACCESSIBILITY */
:focus-visible {
    outline: 2px solid var(--brand-green);
    outline-offset: 2px;
}

/* SELECTION COLOR */
::selection {
    background: var(--brand-green);
    color: white;
}