:root {
    --primary: #00d4ff;
    --dark: #0a1a2f;
    --darker: #050d1a;
    --accent: #0077cc;
}

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

body {
    background: var(--dark);
    color: #e0f0ff;
    font-family: 'Segoe UI', system-ui, sans-serif;
    overflow-x: hidden;
}

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

/* Navbar */
.navbar {
    background: rgba(10, 26, 47, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-link {
    color: #e0f0ff !important;
    transition: all 0.3s ease;
    font-weight: 500;
}

.nav-link:hover {
    color: var(--primary) !important;
}

/* Hero */
.hero {
    min-height: 100vh;
    background: radial-gradient(circle at center, rgba(0, 212, 255, 0.05) 0%, var(--dark) 70%);
    display: flex;
    align-items: center;
}

.hero-photo {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    border: 4px solid rgba(0, 212, 255, 0.3);
    object-fit: cover;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    transition: border-color 0.3s ease;
}

.hero-photo:hover {
    border-color: var(--primary);
}

.hero-subtitle {
    color: var(--primary);
    font-weight: 500;
}

/* Button Custom */
.custom-btn {
    border-radius: 30px;
    font-weight: 600;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.2);
    transition: all 0.3s ease;
}

.custom-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.4);
}

/* Section */
.section {
    padding: 100px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #fff;
    position: relative;
    padding-bottom: 15px;
}

.section-title:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--primary);
    border-radius: 2px;
}

.about-text {
    font-size: 14px;
}

@media (min-width: 768px) {
    .about-text {
        font-size: 1.25rem;
    }
}

.project-card,
.cert-card,
.skill-card,
.edu-card {
    background: rgba(255, 255, 255, 0.02);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
    overflow: hidden;
}

/* Project logo */
.project-logo-wrap {
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

.project-logo {
    width: 52px;
    height: 52px;
    object-fit: contain;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.06);
    padding: 6px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.hard-skill-card {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.07);
    transition: all 0.3s ease;
    overflow: hidden;
}

.hard-skill-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 212, 255, 0.3);
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
}

.experience-card {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: all 0.3s ease;
}

.experience-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.35);
    background: rgba(255, 255, 255, 0.05);
}

.org-card {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: all 0.3s ease;
}

.org-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.35);
    background: rgba(255, 255, 255, 0.05);
}

.org-icon-wrap {
    min-width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.08);
    border-radius: 10px;
    border: 1px solid rgba(0, 212, 255, 0.15);
}

.project-card:hover,
.cert-card:hover,
.skill-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 212, 255, 0.3);
    background: rgba(255, 255, 255, 0.04);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
}

.edu-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 212, 255, 0.25);
    background: rgba(255, 255, 255, 0.04);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.3);
}

.cert-img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    object-position: top center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.tool-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.03);
    color: #e0f0ff;
    padding: 12px 15px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.tool-badge i {
    font-size: 1.2rem;
    color: var(--primary);
    text-align: center;
    word-break: break-word;
}

.tool-badge:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--primary);
    color: #fff;
    transform: translateY(-3px);
}

/* Footer */
.contact-link {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    transition: color 0.2s;
}

.contact-link:hover {
    color: rgba(255, 255, 255, 0.95);
}

.social-btn {
    padding: 7px 14px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.04);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
    transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.social-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.25);
    color: rgba(255, 255, 255, 0.95);
}

.cert-card {
    cursor: pointer;
}

.reveal-section {
    opacity: 0;
    transform-style: preserve-3d;
    perspective: 1200px;
}

.btn-outline-info.custom-btn {
    color: #0dcaf0;
    border-color: #0dcaf0;
}

.btn-outline-info.custom-btn:hover {
    color: #fff;
    background-color: #0dcaf0;
}

/* =========================================
   LANGUAGE TOGGLE BUTTON
========================================= */
.lang-toggle-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 9999;
    background-color: var(--primary);
    color: var(--dark);
    border: none;
    border-radius: 50px;
    padding: 12px 20px;
    font-weight: 700;
    font-size: 1rem;
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.4);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.lang-toggle-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.6);
    background-color: #fff;
}

#shareBtn {
    border-radius: 20px;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

#shareBtn:hover {
    background-color: var(--primary);
    color: var(--dark);
    box-shadow: 0 0 15px var(--primary);
}


/* =========================================
   MOBILE RESPONSIVENESS
========================================= */
@media (max-width: 768px) {
    .hero {
        min-height: auto;
        padding-top: 130px;
        padding-bottom: 50px;
    }

    .section {
        padding: 50px 0;
    }

    .section-title {
        font-size: 2rem;
        margin-bottom: 2rem !important;
    }

    .navbar-toggler {
        border-color: rgba(255, 255, 255, 0.2);
    }

    .navbar-toggler:focus {
        box-shadow: none;
    }

    .navbar-collapse {
        background: var(--dark);
        padding: 15px;
        border-radius: 10px;
        margin-top: 10px;
        border: 1px solid rgba(255, 255, 255, 0.05);
    }

    .lang-toggle-btn {
        bottom: 20px;
        right: 20px;
        padding: 10px 15px;
        font-size: 0.9rem;
    }
}