/* ========================================
   HEADER
   ======================================== */
.header {
    background: var(--color-bg-white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--header-height);
}

.header__inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
    height: 100%;
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

/* Logo */
.header__logo {
    font-size: 28px;
    font-weight: 800;
    color: var(--color-text-dark);
    text-decoration: none;
    letter-spacing: -1px;
    flex-shrink: 0;
}

.header__logo:hover {
    color: var(--color-primary);
}

/* Navigation */
.header__nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex: 1;
}

.header__nav-link {
    padding: 8px 14px;
    color: var(--color-text);
    font-size: var(--font-size-md);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.header__nav-link:hover {
    background: #f0f7ff;
    color: var(--color-primary-dark);
}

.header__nav-link.active {
    background: var(--color-primary-light);
    color: #1565C0;
    font-weight: 600;
}

/* Balance Widget */
.header__balance {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    background: var(--color-success-light);
    color: #2e7d32;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    white-space: nowrap;
    transition: all var(--transition-normal);
    flex-shrink: 0;
}

.header__balance:hover {
    background: #c8e6c9;
    color: #1b5e20;
}

.header__balance strong {
    margin-left: 4px;
    font-weight: 700;
}

/* Header Icons */
.header__icons {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}

.header__icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--color-text-light);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.header__icon:hover {
    background: var(--color-bg);
    color: var(--color-primary);
}

.header__icon svg {
    width: 24px;
    height: 24px;
}

/* Burger Menu */
.header__burger {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    flex-shrink: 0;
}

.header__burger-icon {
    width: 20px;
    height: 18px;
    position: relative;
}

.header__burger-icon span {
    display: block;
    position: absolute;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
    transition: all var(--transition-normal);
    left: 0;
}

.header__burger-icon span:nth-child(1) { top: 0; }
.header__burger-icon span:nth-child(2) { top: 8px; }
.header__burger-icon span:nth-child(3) { top: 16px; }

.header__burger.active .header__burger-icon span:nth-child(1) {
    top: 8px;
    transform: rotate(45deg);
}

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

.header__burger.active .header__burger-icon span:nth-child(3) {
    top: 8px;
    transform: rotate(-45deg);
}

/* Mobile Balance visibility */
.header__balance--mobile {
    display: none;
}

/* ========================================
   MOBILE NAVIGATION
   ======================================== */
@media (max-width: 768px) {
    .header__inner {
        position: relative;
    }

    .header__logo {
        font-size: 24px;
    }

    .header__burger {
        display: flex;
    }

    .header__nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg-white);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-md);
        gap: var(--spacing-sm);
    }

    .header__nav.active {
        display: flex;
    }

    .header__nav-link {
        width: 100%;
        text-align: center;
        padding: var(--spacing-md);
    }

    .header__balance--desktop {
        display: none;
    }

    .header__balance--mobile {
        display: flex;
        margin: 0 0 var(--spacing-md);
        justify-content: center;
        order: -1;
        padding-bottom: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
    }

    .header__icons {
        margin-left: auto;
    }
}