:root {
    --sky-grad: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    --night-grad: linear-gradient(135deg, #0f2027 0%, #203a43 100%);
    --accent: #00d2ff;
    --bg-color: #f4f7f6;
    --card-bg: #ffffff;
    --text-main: #333;
}

body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 500px;
    background: var(--card-bg);
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
    overflow: hidden;
}

/* --- Header --- */
.header {
    background: var(--sky-grad);
    padding: 30px 20px;
    text-align: center;
    color: white;
    position: relative;
}

.plane-icon {
    font-size: 3rem;
    margin-bottom: 10px;
    display: inline-block;
    animation: float 3s ease-in-out infinite;
}

.header h1 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.header p {
    margin: 5px 0 0;
    font-size: 0.9rem;
    opacity: 0.9;
}

/* --- Form --- */
.input-section {
    padding: 30px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: #444;
    font-size: 0.9rem;
}

input[type="time"], input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 1rem;
    box-sizing: border-box;
    transition: border 0.3s;
    font-family: inherit;
}

input:focus {
    border-color: #2a5298;
    outline: none;
}

.btn-generate {
    width: 100%;
    background: #2a5298;
    color: white;
    padding: 15px;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s;
    margin-top: 10px;
}

.btn-generate:hover {
    background: #1e3c72;
    transform: translateY(-2px);
}

.btn-generate:active {
    transform: translateY(0);
}

/* --- Results --- */
#result-card {
    display: none;
    background: #f8faff;
    border-top: 1px solid #eee;
    padding: 30px;
    animation: slideUp 0.4s ease-out;
}

.protocol-step {
    display: flex;
    align-items: flex-start;
    margin-bottom: 20px;
    background: white;
    padding: 15px;
    border-radius: 10px;
    border-left: 4px solid var(--accent);
    box-shadow: 0 4px 6px rgba(0,0,0,0.02);
}

.step-icon {
    font-size: 1.5rem;
    margin-right: 15px;
    min-width: 30px;
    text-align: center;
}

.step-content h3 {
    margin: 0 0 5px 0;
    font-size: 1rem;
    color: #2a5298;
}

.step-content p {
    margin: 0;
    font-size: 0.9rem;
    color: #555;
    line-height: 1.4;
}

.reset-btn {
    background: transparent;
    color: #888;
    border: none;
    width: 100%;
    padding: 10px;
    cursor: pointer;
    font-size: 0.9rem;
    margin-top: 10px;
    transition: color 0.2s;
}

.reset-btn:hover {
    color: #2a5298;
}

/* Animations */
@keyframes float { 
    0% { transform: translateY(0px) rotate(0deg); } 
    50% { transform: translateY(-10px) rotate(2deg); } 
    100% { transform: translateY(0px) rotate(0deg); } 
}

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

/* Mobile Responsiveness */
@media (max-width: 600px) {
    body {
        padding: 10px;
    }
    
    .header h1 {
        font-size: 1.3rem;
    }
    
    .input-section {
        padding: 20px;
    }
    
    #result-card {
        padding: 20px;
    }
}