/* Using a Google Font for a more modern feel */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;700&display=swap');

/* --- 1. DEFINE COLOR VARIABLES (Dark mode is the default) --- */
:root {
    --background-gradient-start: #0E1724;
    --background-gradient-end:   #243047;
    --text-primary: #E5E7EB;
    --text-secondary: #9CA3AF;
    --text-accent: #38BDF8;
    --header-gradient-start: #38BDF8;
    --header-gradient-end: #60A5FA;
    --card-background: #1A2333;
    --border-color: #334155;
    --input-background: #1A2333;
    --input-focus-border: #38BDF8;
    --button-background: #1D8EDA;
    --button-hover-background: #38BDF8;
    --button-disabled-background: #374151;
    --quote-border: #38BDF8;
    --link-color: #38BDF8;
    --loader-track: #374151;
    --loader-spinner: #38BDF8;
}

/* --- 2. ADD LIGHT MODE OVERRIDES --- */
@media (prefers-color-scheme: light) {
    :root {
        --background-gradient-start: #FFFFFF;
        --background-gradient-end:   #F1F5F9;
        --text-primary: #1F2937; /* Dark Gray */
        --text-secondary: #4B5563;
        --text-accent: #2563EB;
        --header-gradient-start: #2563EB;
        --header-gradient-end: #60A5FA;
        --card-background: #FFFFFF;
        --border-color: #D1D5DB;
        --input-background: #F3F4F6;
        --input-focus-border: #2563EB;
        --button-background: #2563EB;
        --button-hover-background: #1E40AF;
        --button-disabled-background: #9CA3AF;
        --quote-border: #2563EB;
        --link-color: #2563EB;
        --loader-track: #E5E7EB;
        --loader-spinner: #2563EB;
    }
}


/* Define key animation for the background gradient */
@keyframes gradient-animation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-primary);
    margin: 0;
    padding: 2rem;
    box-sizing: border-box;
    display: flex;
    flex-direction: column; 
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(-45deg, var(--background-gradient-start), var(--background-gradient-end), var(--background-gradient-start));
    background-size: 400% 400%;
    animation: gradient-animation 15s ease infinite;
    transition: background-color 0.3s ease;
}

.container {
    width: 100%;
    max-width: 800px;
    text-align: center;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;

    /* --- Glassmorphism Effect --- */
    background-color: rgba(255, 255, 255, 0.08);  /* brighten container in dark mode */
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px); /* Safari support */
    border-radius: 1rem; /* Softer edges */
    /* border: 1px solid rgba(255, 255, 255, 0.1); */ /* Replaced by gradient border */
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.2); /* Softer, more spread out shadow */
    padding: 2rem; /* Add padding if not already sufficient */
    position: relative; /* Needed for pseudo-element positioning */
    z-index: 1; /* Ensure content is above pseudo-element */
}

/* Gradient Border for Container */
.container::before {
    content: "";
    position: absolute;
    top: -2px; left: -2px; right: -2px; bottom: -2px; /* Adjust thickness of border via these values */
    background: linear-gradient(45deg, var(--header-gradient-start), var(--header-gradient-end), var(--header-gradient-start));
    background-size: 400% 400%;
    animation: gradient-animation 10s ease infinite; /* Reuse existing gradient animation */
    border-radius: calc(1rem + 2px); /* Match container's border-radius + border thickness */
    z-index: -1; /* Place behind the container's content */
    opacity: 0.25;  /* dial back glow very slightly */
}


/* Adjust padding for body if container has padding now */
body {
    font-family: 'Inter', sans-serif;
    color: var(--text-primary);
    margin: 0;
    /* padding: 2rem; Remove or adjust if container has padding */
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(-45deg, var(--background-gradient-start), var(--background-gradient-end), var(--background-gradient-start));
    background-size: 400% 400%;
    animation: gradient-animation 15s ease infinite;
    transition: background-color 0.3s ease;
    padding: 1rem; /* Added some padding to body to ensure container doesn't touch screen edges */
}

/* --- Header Animation --- */
@keyframes fadeInSlideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

header { /* Apply animation to the header container */
    animation: fadeInSlideDown 0.8s ease-out forwards;
}

header h1 {
    font-weight: 700;
    font-size: 2.5rem;
    background: -webkit-linear-gradient(45deg, var(--header-gradient-start), var(--header-gradient-end));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-top: 0;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.input-form {
    display: grid;
    grid-template-columns: 1fr 1fr auto; /* Existing layout */
    gap: 1.25rem; /* Slightly increased gap for better spacing */
    margin: 2.5rem 0;
    align-items: center; /* Align items vertically for a cleaner look */
}

.input-form input {
    padding: 0.9rem 1.1rem; /* Increased padding for a more substantial feel */
    font-size: 1rem;
    border: 1px solid var(--border-color); /* Existing border */
    border-radius: 0.65rem; /* Slightly more rounded corners */
    background-color: var(--input-background);
    color: var(--text-primary);
    outline: none;
    transition: all 0.2s ease-in-out;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05); /* Subtle shadow for depth */
}

.input-form input:focus {
    border-color: var(--input-focus-border);
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.2);
}

#analyze-button {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: 0.5rem;
    background-color: var(--button-background);
    color: white;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.2s, box-shadow 0.2s; /* Added box-shadow to transition */
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0,0,0,0.1); /* Subtle shadow for depth */
}

#analyze-button:hover {
    background-color: var(--button-hover-background);
    transform: translateY(-2px); /* Existing hover effect */
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15), 0 3px 6px rgba(0,0,0,0.12); /* Enhanced shadow on hover */
}

#analyze-button:active { /* Style for when the button is clicked */
    transform: translateY(-1px) scale(0.98); /* Slight press down and scale effect */
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0,0,0,0.08); /* Reduced shadow on click */
}

#analyze-button:disabled {
    background-color: var(--button-disabled-background);
    cursor: not-allowed;
    transform: translateY(0);
    box-shadow: none; /* Remove shadow when disabled */
}


#results-container {
    margin-top: 2rem;
    text-align: left;
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    background-color: var(--card-background);
    min-height: 200px;
    padding: 1.5rem;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out, box-shadow 0.3s ease-out; /* Added box-shadow to transition */
    box-shadow: 0 4px 15px rgba(0,0,0,0.1); /* Default subtle shadow */
}

#results-container.visible {
    opacity: 1;
    transform: translateY(0);
}

#results-container.visible:hover {
    transform: translateY(-5px) scale(1.01); /* Pop effect: move up and slightly scale */
    box-shadow: 0 8px 25px rgba(0,0,0,0.15); /* Enhanced shadow on hover */
}

.placeholder {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    min-height: 150px;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

@keyframes reveal {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.result-card h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 0;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.75rem;
    margin-bottom: 1rem;
}

.result-section {
    margin-bottom: 1.25rem;
    opacity: 0; 
    animation: reveal 0.6s ease-out forwards;
}

.result-section:nth-child(2) { animation-delay: 0.1s; }
.result-section:nth-child(3) { animation-delay: 0.2s; }
.result-section:nth-child(4) { animation-delay: 0.3s; }
.result-section:nth-child(5) { animation-delay: 0.4s; }


.result-section h3 {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.result-section p, .result-section li {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
}

.result-section ul {
    list-style-type: '✓  ';
    padding-left: 1.5rem;
    margin: 0;
}

.result-section .ceo-quote {
    font-style: italic;
    border-left: 3px solid var(--quote-border);
    padding-left: 1rem;
    color: var(--text-primary);
}

.result-source {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.875rem;
    opacity: 0; 
    animation: reveal 0.6s ease-out forwards;
    animation-delay: 0.5s;
}

.result-source a {
    color: var(--link-color);
    text-decoration: none;
    word-break: break-all;
}

.result-source a:hover {
    text-decoration: underline;
}

.loader {
    border: 4px solid var(--loader-track);
    border-top: 4px solid var(--loader-spinner);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 4rem auto;
    box-shadow: 0 0 15px 2px var(--loader-spinner); /* Subtle glow effect */
}

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

.main-footer {
    width: 100%;
    max-width: 800px;
    text-align: center;
    padding-top: 2rem;
    margin-top: auto;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.main-footer a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.main-footer a:hover {
    color: var(--text-primary);
}

.main-footer .disclaimer {
    font-size: 0.75rem;
    opacity: 0.7;
    margin-top: 0.5rem;
}


/* --- Mobile Responsiveness --- */
@media (max-width: 768px) { /* Breakpoint for tablets and large phones */
    body {
        padding: 1rem; /* Reduce body padding */
    }

    .container {
        padding: 1.5rem; /* Reduce container padding */
        margin: 0 1rem; /* Add some horizontal margin */
    }

    header h1 {
        font-size: 2rem; /* Reduce header font size */
    }

    header p {
        font-size: 1rem; /* Adjust paragraph font size */
    }

    .input-form {
        grid-template-columns: 1fr; /* Stack input fields vertically */
        gap: 1rem; /* Adjust gap for stacked layout */
    }

    #analyze-button {
        padding: 0.9rem 1.5rem; /* Adjust button padding */
    }

    #results-container {
        padding: 1rem;
    }

    .result-card h2 {
        font-size: 1.3rem;
    }
    .result-section p, .result-section li {
        font-size: 0.95rem;
    }

}

@media (max-width: 480px) { /* Breakpoint for smaller phones */
    body {
        padding: 0.5rem;
    }
    .container {
        padding: 1rem;
        margin: 0 0.5rem;
        border-radius: 0.75rem; /* Slightly smaller border radius */
    }
    .container::before {
        border-radius: calc(0.75rem + 2px); /* Adjust gradient border radius */
    }

    header h1 {
        font-size: 1.8rem;
    }

    header p {
        font-size: 0.9rem;
    }

    .input-form input {
        padding: 0.8rem 1rem;
        font-size: 0.95rem;
    }

    #analyze-button {
        font-size: 0.95rem;
    }
}