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

/* Theme Tokens */
:root {
    --bg: #121212;
    --text: #ffffff;
    --heading: #f0f0f0;
    --shadow: rgba(255, 255, 255, 0.2);
    --btn-bg: #1e88e5;
    --btn-bg-hover: #1565c0;
    --btn-text: #ffffff;
    --toggle-bg: #1f1f1f;
    --toggle-border: #3a3a3a;
    --toggle-text: #f5f5f5;
    --ball-text: #1a1a1a;
    --ball-grad-1: #ffffff;
    --ball-grad-2: #ffd54f;
    --ball-grad-3: #f9a825;
}

body[data-theme="light"] {
    --bg: #f7f7f7;
    --text: #121212;
    --heading: #1f1f1f;
    --shadow: rgba(0, 0, 0, 0.18);
    --btn-bg: #0f766e;
    --btn-bg-hover: #115e59;
    --btn-text: #ffffff;
    --toggle-bg: #ffffff;
    --toggle-border: #d1d5db;
    --toggle-text: #111827;
    --ball-text: #1b1b1b;
    --ball-grad-1: #ffffff;
    --ball-grad-2: #b3e5fc;
    --ball-grad-3: #4fc3f7;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    background-color: var(--bg);
    color: var(--text);
    padding: 80px 20px 120px;
}

.app {
    text-align: center;
    width: min(880px, 100%);
}

h1 {
    margin-bottom: 2rem;
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--heading);
    text-shadow: 0 0 10px var(--shadow);
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

#generate-btn {
    padding: 1rem 2rem;
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--btn-text);
    background-color: var(--btn-bg);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

#generate-btn:hover {
    background-color: var(--btn-bg-hover);
    transform: translateY(-2px);
}

.theme-toggle {
    position: fixed;
    top: 24px;
    right: 24px;
    min-width: 128px;
    height: 40px;
    padding: 0 16px;
    border: 1px solid var(--toggle-border);
    cursor: pointer;
    border-radius: 999px;
    background-color: var(--toggle-bg);
    color: var(--toggle-text);
    font-weight: 700;
    letter-spacing: 0.2px;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease, border-color 0.3s ease, transform 0.2s ease;
}

.theme-toggle:hover {
    transform: translateY(-2px);
}

.partner {
    margin-top: 4rem;
    padding: 2rem;
    border-radius: 16px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
    text-align: left;
}

body[data-theme="light"] .partner {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.6));
}

.partner h2 {
    font-size: 1.6rem;
    margin-bottom: 0.5rem;
    color: var(--heading);
}

.partner-desc {
    margin-bottom: 1.5rem;
    opacity: 0.8;
}

.partner-form {
    display: grid;
    gap: 1rem;
}

.partner-form label {
    display: grid;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 0.95rem;
}

.partner-form input,
.partner-form textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: rgba(0, 0, 0, 0.25);
    color: var(--text);
    font-size: 1rem;
}

body[data-theme="light"] .partner-form input,
body[data-theme="light"] .partner-form textarea {
    border: 1px solid rgba(0, 0, 0, 0.12);
    background: rgba(255, 255, 255, 0.85);
}

.partner-form input:focus,
.partner-form textarea:focus {
    outline: 2px solid var(--btn-bg);
    outline-offset: 2px;
}

.partner-submit {
    justify-self: start;
    padding: 0.9rem 1.6rem;
    font-size: 1rem;
    font-weight: 700;
    color: var(--btn-text);
    background-color: var(--btn-bg);
    border: none;
    border-radius: 999px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

.partner-submit:hover {
    background-color: var(--btn-bg-hover);
    transform: translateY(-2px);
}

.hp-field {
    display: none;
}

lotto-numbers {
    display: flex;
    gap: 1rem;
}

.lotto-ball {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, var(--ball-grad-1), var(--ball-grad-2) 40%, var(--ball-grad-3) 70%);
    color: var(--ball-text);
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.35);
}