/* ==================== GLOBAL STYLES ==================== */
:root {
    --primary-gradient: linear-gradient(45deg, #C5A059, #8e7340);
    --secondary-gradient: linear-gradient(45deg, #667eea, #4c63d2);
    --tertiary-gradient: linear-gradient(45deg, #ff4757, #ff3742);
    --accent-color: #C5A059;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.9);
    --text-muted: rgba(255, 255, 255, 0.6);
    --shadow-primary: 0 8px 32px rgba(0,0,0,0.1);
    --shadow-hover: 0 12px 40px rgba(0,0,0,0.15);
    --border-radius: 20px;
    --border-radius-sm: 15px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    background-image: url('../photo/LMC.jpg');
    background-attachment: fixed;
    background-size: cover;
    background-repeat: no-repeat;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    font-weight: 300;
    overflow-x: hidden;
    position: relative;
}

/* ==================== MAIN CONTAINER ==================== */
.container-main {
    max-width: 1200px;
    margin: 120px auto 40px;
    padding: 20px;
    position: relative;
    z-index: 2;
}

/* ==================== FORM CONTAINER ==================== */
.plot-form-container {
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: 30px;
    position: relative;
    transition: var(--transition);
    box-shadow: var(--shadow-primary);
    color: var(--text-primary);
}

.plot-form-container:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

/* ==================== TYPOGRAPHY ==================== */
.plot-form-container h2 {
    font-size: 1.8em;
    color: var(--accent-color);
    margin-bottom: 25px;
    font-weight: 400;
    letter-spacing: 1px;
    text-align: center;
    position: relative;
    padding-bottom: 15px;
}

.plot-form-container h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, #C5A059, #8e7340);
    border-radius: 2px;
}

.plot-form-container p {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 300;
    margin-bottom: 30px;
    line-height: 1.5;
    font-style: italic;
}

/* ==================== FORM STYLES ==================== */
.plot-form-row {
    margin-bottom: 20px;
    position: relative;
}

.plot-form-row label {
    display: block;
    margin-bottom: 8px;
    color: var(--accent-color);
    font-weight: 500;
    letter-spacing: 0.5px;
    font-size: 14px;
    transition: var(--transition);
}

/* Input field base styles */
.plot-form-row input,
.plot-form-row select,
.plot-form-row textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    box-sizing: border-box;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    font-family: 'Helvetica Neue', Arial, sans-serif;
    font-weight: 300;
    transition: var(--transition);
    outline: none;
}

.plot-form-row input::placeholder,
.plot-form-row textarea::placeholder {
    color: var(--text-muted);
    font-weight: 300;
}

/* Focus state */
.plot-form-row input:focus,
.plot-form-row select:focus,
.plot-form-row textarea:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 20px rgba(70, 255, 175, 0.3);
    background: rgba(255, 255, 255, 0.15);
}

.plot-form-row input:focus + label,
.plot-form-row select:focus + label,
.plot-form-row textarea:focus + label {
    color: var(--accent-color);
}

/* Select styles */
.plot-form-row select {
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2346ffaf' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
}

.plot-form-row select option {
    background: rgba(0, 0, 0, 0.9);
    color: var(--text-primary);
    padding: 10px;
    border: none;
}

.plot-form-row select option:checked {
    background: var(--accent-color);
    color: #000000;
}

.plot-form-row select option:hover {
    background: rgba(70, 255, 175, 0.2);
}

/* Textarea styles */
.plot-form-row textarea {
    min-height: 120px;
    resize: vertical;
    line-height: 1.6;
}

/* ==================== BUTTONS ==================== */
.plot-form-buttons {
    display: flex;
    gap: 15px;
    margin-top: 25px;
    flex-wrap: wrap;
    justify-content: center;
}

.plot-form-buttons button {
    padding: 12px 30px;
    font-size: 14px;
    font-weight: 400;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    letter-spacing: 0.5px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    font-family: 'Helvetica Neue', Arial, sans-serif;
    position: relative;
    overflow: hidden;
    min-width: 140px;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    text-align: center;
}

#generate-btn {
    background: var(--primary-gradient);
    color: var(--text-primary);
    box-shadow: 0 6px 20px rgba(70, 255, 175, 0.25);
}

#generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(70, 255, 175, 0.3);
    background: linear-gradient(45deg, #52ffb8, #35b57a);
}

#clear-btn {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.1);
}

#clear-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.15);
}

/* Button click effect */
.plot-form-buttons button:active {
    transform: translateY(0);
}

/* ==================== LOADING SPINNER ==================== */
.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid rgba(70, 255, 175, 0.3);
    border-top: 3px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 8px;
    display: inline-block;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ==================== RESPONSIVE DESIGN ==================== */
@media (max-width: 1024px) {
    .container-main {
        max-width: 90%;
        padding: 15px;
    }
    
    .plot-form-buttons {
        flex-direction: column;
        gap: 12px;
    }
    
    .plot-form-buttons button {
        width: 100%;
        margin: 0;
    }
}

@media (max-width: 768px) {
    .container-main {
        margin: 100px auto 30px;
        padding: 15px;
    }
    
    .plot-form-container {
        padding: 20px;
    }
    
    .plot-form-container h2 {
        font-size: 1.5em;
        margin-bottom: 20px;
    }
    
    .plot-form-row {
        margin-bottom: 15px;
    }
    
    .plot-form-row input,
    .plot-form-row select,
    .plot-form-row textarea {
        padding: 10px 14px;
        font-size: 16px; /* Prevent zoom on iOS */
    }
    
    .plot-form-buttons button {
        padding: 15px;
        font-size: 16px;
        margin: 0;
    }
}

@media (max-width: 480px) {
    .container-main {
        margin: 90px auto 25px;
        padding: 10px;
    }
    
    .plot-form-container {
        padding: 15px;
    }
    
    .plot-form-container h2 {
        font-size: 1.3em;
        margin-bottom: 15px;
    }
    
    .plot-form-container p {
        font-size: 0.875rem;
        margin-bottom: 25px;
    }
    
    .plot-form-row {
        margin-bottom: 12px;
    }
    
    .plot-form-row label {
        font-size: 13px;
    }
    
    .plot-form-row input,
    .plot-form-row select,
    .plot-form-row textarea {
        padding: 12px;
        border-radius: 12px;
    }
    
    .plot-form-buttons {
        margin-top: 20px;
        gap: 10px;
    }
    
    .plot-form-buttons button {
        padding: 12px;
        font-size: 14px;
    }
}

/* ==================== ACCESSIBILITY & INTERACTIONS ==================== */
/* Focus indicators */
.plot-form-row input:focus-visible,
.plot-form-row select:focus-visible,
.plot-form-row textarea:focus-visible,
.plot-form-buttons button:focus-visible {
    outline: 2px solid rgba(70, 255, 175, 0.5);
    outline-offset: 2px;
}

/* Form validation states */
.plot-form-row input:invalid:not(:placeholder-shown) {
    border-color: rgba(255, 71, 87, 0.6);
    box-shadow: 0 0 20px rgba(255, 71, 87, 0.3);
}

.plot-form-row input:valid:not(:placeholder-shown) {
    border-color: rgba(70, 255, 175, 0.6);
    box-shadow: 0 0 20px rgba(70, 255, 175, 0.2);
}

/* ==================== SCROLLBAR STYLING ==================== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: rgba(70, 255, 175, 0.6);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(70, 255, 175, 0.8);
}

/* ==================== SELECTION STYLING ==================== */
::selection {
    background: rgba(70, 255, 175, 0.3);
    color: var(--text-primary);
}

::-moz-selection {
    background: rgba(70, 255, 175, 0.3);
    color: var(--text-primary);
}

/* ==================== LOADING STATES ==================== */
.plot-form-buttons button.loading {
    background: linear-gradient(45deg, #74b9ff, #0984e3);
    animation: pulse 1.5s infinite;
    pointer-events: none;
    opacity: 0.7;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.7; }
    100% { opacity: 1; }
}

/* ==================== MESSAGE STYLING ==================== */
.error-message {
    background: var(--tertiary-gradient);
    color: var(--text-primary);
    padding: 15px 20px;
    border-radius: var(--border-radius-sm);
    margin-top: 15px;
    text-align: center;
    font-weight: 400;
    letter-spacing: 0.5px;
    box-shadow: 0 6px 20px rgba(255, 71, 87, 0.25);
    border: 1px solid rgba(255, 71, 87, 0.3);
    animation: slideInUp 0.4s ease;
}

.success-message {
    background: var(--primary-gradient);
    color: var(--text-primary);
    padding: 15px 20px;
    border-radius: var(--border-radius-sm);
    margin-top: 15px;
    text-align: center;
    font-weight: 400;
    letter-spacing: 0.5px;
    box-shadow: 0 6px 20px rgba(70, 255, 175, 0.25);
    border: 1px solid rgba(70, 255, 175, 0.3);
    animation: slideInUp 0.4s ease;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== ENHANCED HOVER EFFECTS ==================== */
.plot-form-row:hover label {
    color: var(--accent-color);
    transform: translateX(2px);
}

.plot-form-row input:hover,
.plot-form-row select:hover,
.plot-form-row textarea:hover {
    border-color: rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 0.12);
}

/* ==================== INPUT SPECIFIC STYLING ==================== */
input[type="date"] {
    color-scheme: dark;
}

input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(1);
    opacity: 0.8;
}

input[type="date"]::-webkit-calendar-picker-indicator:hover {
    opacity: 1;
}

/* ==================== GLASS MORPHISM EFFECTS ==================== */
.plot-form-container::after {
    content: '';
    position: absolute;
    top: 1px;
    left: 1px;
    right: 1px;
    bottom: 1px;
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.1) 0%, 
        rgba(255, 255, 255, 0.05) 50%, 
        rgba(255, 255, 255, 0.02) 100%);
    border-radius: calc(var(--border-radius) - 1px);
    pointer-events: none;
    z-index: -1;
}

/* ==================== ANIMATION KEYFRAMES ==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== FORM ENHANCEMENT ==================== */
.plot-form-container {
    animation: fadeInUp 0.6s ease;
}

.plot-form-row {
    animation: fadeInUp 0.4s ease;
    animation-delay: calc(var(--delay, 0) * 0.1s);
}

/* Add delayed animation for each form row */
.plot-form-row:nth-child(1) { --delay: 1; }
.plot-form-row:nth-child(2) { --delay: 2; }
.plot-form-row:nth-child(3) { --delay: 3; }
.plot-form-row:nth-child(4) { --delay: 4; }
.plot-form-row:nth-child(5) { --delay: 5; }

/* ==================== BUTTON ENHANCEMENTS ==================== */
.plot-form-buttons button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.plot-form-buttons button:hover::before {
    left: 100%;
}