/* ==========================================================================
   HEADER - Header, Navigation, Top Bar
   ========================================================================== */

/* Header Container */
.header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

/* Top Bar */
.top-bar {
    background: var(--secondary-color);
    color: var(--white);
    padding: 8px 0;
    font-size: 0.875rem;
}

.top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.date-time i {
    margin-right: 5px;
}

.social-links a {
    color: var(--white);
    margin-left: 15px;
    font-size: 0.9rem;
    transition: color 0.3s;
}

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

.top-bar-content .social-links a {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.top-bar-content .social-links i {
    font-size: 0.875rem;
}

/* Main Header */
.main-header {
    padding: 20px 0;
    min-height: auto;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    position: relative;
}

/* Logo */
.logo {
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.logo-image {
    height: 60px;
    width: auto;
    max-width: 100%;
    transition: all 0.3s ease;
    object-fit: contain;
}

/* Navigation */
.main-nav {
    flex-grow: 1;
    display: flex;
    justify-content: center;
    margin: 0 20px;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: clamp(15px, 2.5vw, 30px);
    flex-wrap: nowrap;
    align-items: center;
}

.main-nav a {
    color: var(--text-dark);
    font-weight: 500;
    padding: 8px 0;
    border-bottom: 2px solid transparent;
    transition: var(--transition-base);
    white-space: nowrap;
    font-size: clamp(0.875rem, 1vw, 1rem);
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

/* Header Action Buttons */
.header-actions {
    display: flex;
    gap: 15px;
    align-items: center;
    flex-shrink: 0;
}

.btn-login {
    color: var(--secondary-color);
    font-weight: 600;
    padding: 10px 24px;
    border: 2px solid var(--secondary-color);
    border-radius: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    font-size: clamp(0.875rem, 1vw, 1rem);
    background: transparent;
}

.btn-login:hover {
    border-color: var(--action-primary);
    color: var(--action-primary);
    background: rgba(42, 157, 143, 0.08);
    transform: translateY(-1px);
}

.btn-trial {
    background: var(--action-primary);
    color: var(--white);
    font-weight: 600;
    padding: 12px 28px;
    border-radius: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-action);
    white-space: nowrap;
    font-size: clamp(0.875rem, 1vw, 1rem);
    border: none;
}

.btn-trial:hover {
    background: var(--action-primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-action-hover);
}

/* Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-dark);
    flex-shrink: 0;
}

.menu-toggle i {
    transition: transform 0.3s ease;
}

/* Mobile Authentication Buttons - Hide by default */
.mobile-auth-buttons {
    display: none;
}

/* ========================================================================
   RESPONSIVE BREAKPOINTS - Intermediate Scaling
   ======================================================================== */

/* Large Desktop (1400px and above) */
@media (min-width: 1400px) {
    .main-nav {
        margin: 0 40px;
    }

    .main-nav ul {
        gap: 35px;
    }
}

/* Desktop to Large Tablet (1200px - 1024px) */
@media (max-width: 1200px) {
    .logo-image {
        height: 200px;
    }

    .main-nav ul {
        gap: 20px;
    }

    .main-nav {
        margin: 0 15px;
    }
}

/* Tablet Landscape (1024px - 992px) */
@media (max-width: 1024px) {
    .logo-image {
        height: 180px;
    }

    .main-nav ul {
        gap: 15px;
    }

    .btn-login,
    .btn-trial {
        padding: 8px 15px;
        font-size: 0.875rem;
    }

    .header-actions {
        gap: 10px;
    }
}

/* Tablet (992px and below) - Switch to mobile menu */
@media (max-width: 992px) {
    .main-header {
        padding: 15px 0;
        min-height: 80px;
    }

    .logo-image {
        height: 140px; /* Smaller for tablet */
    }

    /* Hide navigation and show mobile menu */
    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        padding: 20px;
        z-index: 999;
        width: 100%;
        margin: 0;
    }

    .main-nav.mobile-open {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 0;
    }

    .main-nav ul li {
        margin-bottom: 15px;
        padding-bottom: 15px;
        border-bottom: 1px solid var(--border-color);
    }

    .main-nav ul li:last-child {
        border-bottom: none;
        margin-bottom: 0;
        padding-bottom: 0;
    }

    .header-actions {
        display: none !important;
    }

    .menu-toggle {
        display: block !important;
    }

    /* Mobile Authentication Buttons */
    .main-nav.mobile-open .mobile-auth-buttons {
        display: flex;
        flex-direction: column;
        gap: 15px;
        margin-top: 20px;
        padding-top: 20px;
        border-top: 2px solid var(--border-color);
    }

    .mobile-user-info {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        padding: 14px;
        background: var(--bg-light);
        border-radius: 6px;
        font-weight: 600;
        color: var(--text-dark);
        font-size: 1rem;
    }

    .mobile-user-info i {
        font-size: 1.25rem;
        color: var(--primary-color);
    }

    .btn-mobile-login,
    .btn-mobile-register,
    .btn-mobile-logout {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        width: 100%;
        padding: 15px 20px;
        border-radius: 8px;
        font-weight: 600;
        font-size: 1rem;
        text-align: center;
        transition: var(--transition-base);
        box-sizing: border-box;
        min-height: 50px;
    }

    .btn-mobile-login {
        background: white;
        color: var(--primary-color);
        border: 2px solid var(--primary-color);
    }

    .btn-mobile-login:hover {
        background: var(--primary-color);
        color: white;
    }

    .btn-mobile-register {
        background: var(--primary-color);
        color: white;
        border: 2px solid var(--primary-color);
        box-shadow: 0 2px 8px rgba(230, 57, 70, 0.3);
    }

    .btn-mobile-register:hover {
        background: #d62839;
        border-color: #d62839;
        box-shadow: 0 4px 12px rgba(230, 57, 70, 0.4);
    }

    .btn-mobile-logout {
        background: white;
        color: var(--error-color);
        border: 2px solid var(--error-color);
    }

    .btn-mobile-logout:hover {
        background: var(--error-color);
        color: white;
    }
}

/* Mobile (768px and below) */
@media (max-width: 768px) {
    .top-bar {
        padding: 6px 0;
    }

    .top-bar-content {
        font-size: 0.75rem;
    }

    .date-time {
        font-size: 0.75rem;
    }

    .top-bar-content .social-links {
        display: none;
    }

    .main-header {
        padding: 10px 0;
        min-height: 60px;
    }

    .logo-image {
        height: 100px;
    }

    .header-content {
        gap: 15px;
    }
}

/* Small Mobile (480px and below) */
@media (max-width: 480px) {
    .top-bar-content {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }

    .logo-image {
        height: 80px;
    }

    .menu-toggle {
        font-size: 1.25rem;
    }
}