/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: background var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

header.transparent {
    background: rgba(255, 255, 255, 0);
    box-shadow: none;
}

body.dark-mode header {
    background: rgba(26, 26, 46, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

body.dark-mode header.transparent {
    background: rgba(26, 26, 46, 0);
    box-shadow: none;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-pink);
    cursor: pointer;
    transition: transform var(--transition-speed) ease;
}

.logo:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    transition: color var(--transition-speed) ease;
    position: relative;
}

body.dark-mode .nav-links a {
    color: var(--text-dark);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-pink);
    transition: width var(--transition-speed) ease;
}

.nav-links a:hover {
    color: var(--primary-pink);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.dark-mode-toggle {
    background: none;
    border: 2px solid var(--primary-pink);
    width: 45px;
    height: 45px;
    border-radius: 50%;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.dark-mode-toggle i {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.1rem;
    color: var(--primary-pink);
    transition: all 0.4s ease;
}

.dark-mode-toggle .fa-moon {
    opacity: 1;
}

.dark-mode-toggle .fa-sun {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(-180deg);
}

body.dark-mode .dark-mode-toggle .fa-moon {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(180deg);
}

body.dark-mode .dark-mode-toggle .fa-sun {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0);
}

.dark-mode-toggle:hover {
    background: var(--primary-pink);
    transform: scale(1.1);
}

.dark-mode-toggle:hover i {
    color: white;
}

/* Unique Burger Menu */
.burger {
    display: none;
    width: 45px;
    height: 45px;
    cursor: pointer;
    position: relative;
    border-radius: 50%;
    border: 2px solid var(--primary-pink);
    transition: all 0.3s ease;
}

.burger:hover {
    background: rgba(255, 105, 180, 0.1);
}

.burger-inner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 22px;
    height: 16px;
}

.burger-inner span {
    position: absolute;
    width: 100%;
    height: 2px;
    background: var(--primary-pink);
    border-radius: 2px;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.burger-inner span:nth-child(1) {
    top: 0;
    width: 60%;
}

.burger-inner span:nth-child(2) {
    top: 50%;
    transform: translateY(-50%);
}

.burger-inner span:nth-child(3) {
    bottom: 0;
    width: 80%;
}

/* Burger Active State - X Animation */
.burger.active .burger-inner span:nth-child(1) {
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
    width: 100%;
}

.burger.active .burger-inner span:nth-child(2) {
    opacity: 0;
    transform: translateY(-50%) scaleX(0);
}

.burger.active .burger-inner span:nth-child(3) {
    bottom: 50%;
    transform: translateY(50%) rotate(-45deg);
    width: 100%;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        flex-direction: column;
        background: var(--bg-light);
        width: 100%;
        height: 100vh;
        padding: 6rem 2rem 2rem;
        box-shadow: -5px 0 30px rgba(0, 0, 0, 0.1);
        transition: right 0.4s ease;
        gap: 0;
    }

    body.dark-mode .nav-links {
        background: var(--bg-dark);
    }

    .nav-links li {
        opacity: 0;
        transform: translateX(50px);
        transition: all 0.4s ease;
    }

    .nav-links.active li {
        opacity: 1;
        transform: translateX(0);
    }

    .nav-links.active li:nth-child(1) { transition-delay: 0.1s; }
    .nav-links.active li:nth-child(2) { transition-delay: 0.2s; }
    .nav-links.active li:nth-child(3) { transition-delay: 0.3s; }
    .nav-links.active li:nth-child(4) { transition-delay: 0.4s; }
    .nav-links.active li:nth-child(5) { transition-delay: 0.5s; }
    .nav-links.active li:nth-child(6) { transition-delay: 0.6s; }

    .nav-links a {
        display: block;
        padding: 1rem 0;
        font-size: 1.5rem;
        font-weight: 600;
        border-bottom: 1px solid rgba(255, 105, 180, 0.1);
    }

    .nav-links.active {
        right: 0;
    }

    .burger {
        display: flex;
        z-index: 1001;
    }

    nav {
        padding: 1rem 5%;
    }
}