:root {
    --primary: #00f2fe;
    --secondary: #4facfe;
    --dark-bg: #0a0b10;
    --light-bg: rgba(245, 248, 252, 0.85);
    --glass: rgba(255, 255, 255, 0.05);
    --text-color: white;
    --input-bg: rgba(0, 0, 0, 0.3);
    --input-border: rgba(255, 255, 255, 0.2);
}

body.light-mode {
    --dark-bg: rgba(245, 248, 252, 0.85);
    --light-bg: #0a0b10;
    --glass: rgba(255, 255, 255, 0.85);
    --text-color: #1a1a1a;
    --input-bg: rgba(255, 255, 255, 0.9);
    --input-border: rgba(0, 0, 0, 0.2);
}

body {
    background: var(--dark-bg);
    color: var(--text-color);
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    min-height: 100vh;
    transition: background 0.3s ease, color 0.3s ease;
    position: relative;
}

/* Background Image */
.bg-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    min-height: 100%;
    z-index: -1;
    overflow: hidden;
}

.fullscreen-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    min-height: 100vh;
    object-fit: cover;
    opacity: 0.15;
    filter: blur(0px);
}

body.light-mode .fullscreen-bg {
    opacity: 0.25;
}

/* Glassmorphism Form */
.form-container {
    padding: 40px;
    padding-top: 60px;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
}

.glass-form {
    background: var(--glass);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
}

.tech-title {
    text-align: center;
    letter-spacing: 5px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 30px;
}

/* Required field asterisk */
.required {
    color: #ff4444;
    margin-left: 4px;
    font-weight: bold;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.full-width {
    grid-column: span 1;
}

input,
textarea,
select {
    width: 100%;
    padding: 12px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    color: var(--text-color);
    outline: none;
    transition: 0.3s;
    box-sizing: border-box;
}

input:focus,
textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.3);
}

.range-row {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.range-inputs {
    display: flex;
    gap: 10px;
}

.submit-btn {
    width: 100%;
    margin-top: 30px;
    padding: 15px;
    background: linear-gradient(45deg, var(--secondary), var(--primary));
    border: none;
    border-radius: 10px;
    color: black;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    transition: 0.4s;
}

.submit-btn:hover {
    transform: scale(1.02);
    box-shadow: 0 0 20px var(--primary);
}

/* Theme Toggle Button */
.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--input-border);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 100;
}

.theme-toggle:hover {
    transform: rotate(180deg) scale(1.1);
    box-shadow: 0 0 15px var(--primary);
}

.theme-toggle i {
    font-size: 1.5rem;
    color: var(--primary);
    transition: transform 0.3s ease;
}

/* Location Button */
.location-btn {
    width: 100%;
    padding: 12px;
    background: linear-gradient(45deg, var(--secondary), var(--primary));
    border: none;
    border-radius: 8px;
    color: black;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: 0.3s;
    font-size: 14px;
}

.location-btn:hover {
    transform: scale(1.02);
    box-shadow: 0 0 15px var(--primary);
}

.location-btn i {
    font-size: 1.2rem;
}

.location-btn.active {
    background: linear-gradient(45deg, #4caf50, #8bc34a);
}

/* Brand Checkboxes */
.brands-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 10px;
    padding: 10px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    max-height: 250px;
    overflow-y: auto;
}

.brand-checkbox {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    background: rgba(79, 172, 254, 0.1);
    border-radius: 6px;
    cursor: pointer;
    transition: 0.2s;
    user-select: none;
}

.brand-checkbox:hover {
    background: rgba(79, 172, 254, 0.2);
    transform: translateY(-2px);
}

.brand-checkbox input[type="checkbox"] {
    width: auto;
    margin-right: 8px;
    cursor: pointer;
    accent-color: var(--primary);
}

.brand-checkbox label {
    cursor: pointer;
    font-size: 14px;
    color: var(--text-color);
}

/* Scrollbar Styling */
.brands-container::-webkit-scrollbar {
    width: 6px;
}

.brands-container::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
}

.brands-container::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 10px;
}

.brands-container::-webkit-scrollbar-thumb:hover {
    background: var(--secondary);
}

/* Radio Button Group */
.radio-group {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.radio-option {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    background: rgba(79, 172, 254, 0.1);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    cursor: pointer;
    transition: 0.2s;
    user-select: none;
    flex: 1;
    min-width: 140px;
}

.radio-option:hover {
    background: rgba(79, 172, 254, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 242, 254, 0.2);
}

.radio-option input[type="radio"] {
    width: auto;
    margin-right: 10px;
    cursor: pointer;
    accent-color: var(--primary);
}

.radio-option span {
    font-size: 14px;
    color: var(--text-color);
    font-weight: 500;
    cursor: pointer;
}

.radio-option:has(input:checked) {
    background: rgba(79, 172, 254, 0.3);
    border-color: var(--primary);
    box-shadow: 0 0 12px rgba(0, 242, 254, 0.3);
}

/* Responsive Design - Mobile First */
@media (max-width: 768px) {
    .form-container {
        padding: 15px;
        max-width: 95%;
    }

    .glass-form {
        padding: 20px;
        border-radius: 15px;
    }

    .tech-title {
        font-size: 1.5rem;
        letter-spacing: 3px;
        margin-bottom: 20px;
    }

    .floating-mobile {
        font-size: 3rem;
    }

    input,
    textarea,
    select {
        padding: 14px;
        font-size: 16px;
        /* Prevents iOS zoom on focus */
    }

    .submit-btn {
        padding: 16px;
        font-size: 16px;
    }

    .range-inputs {
        gap: 8px;
    }

    select[multiple] {
        min-height: 150px;
    }
}

@media (max-width: 480px) {
    .form-container {
        padding: 10px;
        max-width: 95%;
    }

    .glass-form {
        padding: 18px;
        border-radius: 12px;
    }

    .tech-title {
        font-size: 1.3rem;
        letter-spacing: 2px;
    }

    .floating-mobile {
        font-size: 2.5rem;
    }

    input,
    textarea,
    select {
        padding: 12px;
    }

    .submit-btn {
        padding: 14px;
        font-size: 15px;
    }

    .brands-container {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
}

@media (max-width: 360px) {
    .form-container {
        padding: 8px;
        max-width: 96%;
    }

    .glass-form {
        padding: 15px;
    }

    .tech-title {
        font-size: 1.1rem;
        letter-spacing: 1px;
    }

    input,
    textarea,
    select {
        padding: 10px;
        font-size: 14px;
    }
}