/*
* LittleLink
* https://littlelink.io
* Free to use under the MIT license
* http://www.opensource.org/licenses/mit-license.php
*/

/* Base Typography Settings
–––––––––––––––––––––––––––––––––––––––––––––––––– */
:root {
	font-size:16px;
}

/* Grid
  –––––––––––––––––––––––––––––––––––––––––––––––––– */
  .container {
	position:relative;
	width:100%;
	max-width:37.5rem;     				/* 600px */
    text-align:center;
	margin:0 auto;
	padding:3rem 1.25rem 0 1.25rem;
	box-sizing:border-box;
}
.container-left {
	position:relative;
	width:100%;
	max-width:37.5rem;
	text-align:left;
	margin:0 auto;
	padding:0 1.25rem;
	box-sizing:border-box;
}
.container-left p {
	margin-bottom: 1rem;  				/* 16px space between paragraphs */
  }
.column {
	position:center;
	width:100%;
	float:center;
	box-sizing:border-box;
}
/* For devices larger than 400px */
  @media (min-width:25rem) {            /* 400px */
    .container {
	width:85%;
	padding-left:0;
	padding-right:0;
}
}/* For devices larger than 550px */
  @media (min-width:34.375rem) {        /* 550px */
    .container {
	width:80%;
}
.column,.columns {
	margin-left:0;
}
.column:first-child,.columns:first-child {
	margin-left:0;
}
}

/* Base Styles
  –––––––––––––––––––––––––––––––––––––––––––––––––– */
  body {
	margin:0;
	padding:0;
	background-color:#ffffff;
	color:#1a1a1a;
	font-family:"Open Sans",system-ui;
	font-size:1.125rem;     				/* 18px */
    font-weight:400;
	line-height:1.6;
}

/* Typography
  –––––––––––––––––––––––––––––––––––––––––––––––––– */
  h1 {
	margin:0 0 0.5rem 0;
	font-size:3rem;         		/* 48px */
    font-weight:800;
	line-height:1;
	letter-spacing:0;
	word-wrap:break-word;
	overflow-wrap:break-word;
	hyphens:auto;           		/* Delete this to remove automatic hyphen on line break */
}
.container p {
	margin:0 0 2rem 0;
}

/* Base Typography Settings
–––––––––––––––––––––––––––––––––––––––––––––––––– */
/* Base size - 16px browser default */
:root {
  font-size:16px;           /* Using a 1.25 modular scale for typography */
  --scale-0:1rem;           /* 16px */
  --scale-1:1.25rem;        /* 20px */
  --scale-2:1.563rem;       /* 25px */
  --scale-3:1.953rem;       /* 31px */
  --scale-4:2.441rem;       /* 39px */
  --scale-5:3.052rem;       /* 49px */

  /* Spacing units */
  --spacing-xs:0.5rem;      /* 8px */
  --spacing-s:1rem;         /* 16px */
  --spacing-m:1.5rem;       /* 24px */
  --spacing-l:2rem;         /* 32px */
  --spacing-xl:3rem;        /* 48px */
  --spacing-xxl:4rem;       /* 64px */
}

/* Avatar */
.avatar {
	width: 8rem;             /* 128px */
	height: 8rem;
	border-radius: 50%;
	object-fit: cover;
	background-position: center;
	margin-bottom: var(--spacing-l);
	margin-left: auto;
	margin-right: auto;
	display: block;
  }

/* Typography Scale */
h1 {
	margin:0 0 var(--spacing-s) 0;
	font-size:var(--scale-5);           /* ~49px */
  	font-weight:800;
	line-height:1.1;
	letter-spacing:-0.02em;
	word-wrap:break-word;
	overflow-wrap:break-word;
}
body {
	font-size:var(--scale-1);           /* 20px */
  	line-height:1.6;
}
.container p {
	margin:0 0 var(--spacing-l) 0;
	font-size:var(--scale-1);
	line-height:1.6;
	font-weight:600;
}

/* Container spacing */
.container {
	padding:var(--spacing-xl) var(--spacing-m) 0 var(--spacing-m);
	text-align:center;
}

/* Footer */
footer {
	margin:var(--spacing-l) 0;            /* Reduced from var(--spacing-xxl) (4rem to 2rem) */
    font-size:var(--scale-0);
}

/* Responsive adjustments */
@media (max-width:34.375rem) {              /* 550px */
  h1 {
	font-size:var(--scale-4);
	margin:0 0 var(--spacing-xs) 0;         /* Further reduced for mobile */
}
body {
	font-size:var(--scale-0);
}
.container p {
	font-size:var(--scale-0);
	margin:0 0 var(--spacing-m) 0;          /* Reduced from default for mobile */
}
.avatar {
	margin-bottom:var(--spacing-s);          /* Reduced from var(--spacing-m) */
}
footer {
	margin:var(--spacing-m) 0;              /* Reduced from var(--spacing-xl) (3rem to 1.5rem) */
}
}

/* Links
  –––––––––––––––––––––––––––––––––––––––––––––––––– */
  a {
	color:#2457F5;
	text-decoration:underline;
}
a:hover {
	color:#083BDA;
}

/* Buttons
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.button,button {
	display:flex;
	align-items:center;
	justify-content:center;
	width:18.75rem;             	/* 300px */
 	min-height:3rem;                /* 48px */
  	padding:0.75rem 1rem;         	/* 12px ; 16px */
  	font-size:1.125rem;           	/* 18px */
  	font-weight:700;
	text-decoration:none;
	white-space:nowrap;
  	background-color:var(--button-background,transparent);
	color:var(--button-text,#000000);
	border:var(--button-border,none);
	border-radius:0.5rem;
	cursor:pointer;
	box-sizing:border-box;
  	margin-bottom:1rem;
	text-align:center;
	line-height:1.3;
}

/* Icons
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.icon {
	width:1.25rem;
	height:1.25rem;
	margin-right:0.5rem;
	flex-shrink:0;
	display:block;
}

/* Avatar
  –––––––––––––––––––––––––––––––––––––––––––––––––– */
.avatar {
	width: 8rem;             /* 128px */
	height: 8rem;
	object-fit: cover;
	background-position: center;
	margin-bottom: var(--spacing-l);
  }

   /* Modifier for no avatar rounding */
   .avatar--none {
	border-radius: 0%;
  }

  /* Modifier for rounded avatar */
  .avatar--rounded {
	border-radius: 50%;
  }

  /* Modifier for slightly rounded corners */
  .avatar--soft {
	border-radius: 0.5rem;   /* 8px rounded corners */
  }

/* Theme System
  –––––––––––––––––––––––––––––––––––––––––––––––––– */
/* Light theme is default above */

/* Dark theme */
:root.theme-dark {
	color-scheme:dark;
}
:root.theme-dark :focus-visible {
	outline: 2px solid #4899F7;
	outline-offset: 2px;
  }
:root.theme-dark body {
	background-color:#121212;
	color:#ffffff;
}
:root.theme-dark a:not(.button) {
	color:#4899F7;
}
:root.theme-dark a:not(.button):hover {
	color:#7AB8FF;
}

/* Auto theme */
:root.theme-auto {
	color-scheme:light dark;
}
@media (prefers-color-scheme:dark) {
	:root.theme-auto body {
	background-color:#121212;
	color:#ffffff;
}
:root.theme-auto :focus-visible {
    outline: 2px solid #4899F7;
    outline-offset: 2px;
  }
:root.theme-auto a:not(.button) {
	color:#4899F7;
}
:root.theme-auto a:not(.button):hover {
	color:#7AB8FF;
}
}

/* Button Text Color Override
    –––––––––––––––––––––––––––––––––––––––––––––––––– */
    .button:hover,button:hover {
	color:var(--button-text);
}

/* Responsive Typography
  –––––––––––––––––––––––––––––––––––––––––––––––––– */
  @media (max-width:34.375rem) {            /* 550px */
    h1 {
	font-size:2rem;                         /* 32px */
	}
	body {
	font-size:1rem;                    		/* 16px */
	}
}

/* Privacy Page Styles
  –––––––––––––––––––––––––––––––––––––––––––––––––– */
nav {
	margin:var(--spacing-l) 0;
	text-align:left;
}
section {
	margin:var(--spacing-xl) 0;
	text-align:left;
}
h2 {
	font-size:var(--scale-3);
	font-weight:700;
	margin-bottom:var(--spacing-m);
}
h3 {
	font-size:var(--scale-2);
	font-weight:600;
	margin:var(--spacing-l) 0 var(--spacing-s) 0;
}
ul {
	list-style:none;
	padding:0;
	margin:0 0 var(--spacing-m) 0;
}
ul li {
	margin-bottom:var(--spacing-xs);
}

/* Privacy page specific responsive adjustments */
  @media (max-width:34.375rem) {
	h2 {
	font-size:var(--scale-2);
	}
	h3 {
	font-size:var(--scale-1);
	}
	section {
	margin:var(--spacing-l) 0;
	}
}

/* Font Face Definitions
  –––––––––––––––––––––––––––––––––––––––––––––––––– */
@font-face {
	font-display:swap;
	font-family:'Open Sans';
	font-style:normal;
	font-weight:400;
	src:url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-regular.eot');
	src:url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-regular.eot?#iefix') format('embedded-opentype'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-regular.woff2') format('woff2'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-regular.woff') format('woff'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-regular.ttf') format('truetype'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-regular.svg#OpenSans') format('svg');
}
@font-face {
	font-display:swap;
	font-family:'Open Sans';
	font-style:normal;
	font-weight:600;
	src:url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-600.eot');
	src:url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-600.eot?#iefix') format('embedded-opentype'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-600.woff2') format('woff2'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-600.woff') format('woff'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-600.ttf') format('truetype'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-600.svg#OpenSans') format('svg');
}
@font-face {
	font-display:swap;
	font-family:'Open Sans';
	font-style:normal;
	font-weight:700;
	src:url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-700.eot');
	src:url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-700.eot?#iefix') format('embedded-opentype'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-700.woff2') format('woff2'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-700.woff') format('woff'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-700.ttf') format('truetype'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-700.svg#OpenSans') format('svg');
}
@font-face {
	font-display:swap;
	font-family:'Open Sans';
	font-style:normal;
	font-weight:800;
	src:url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-800.eot');
	src:url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-800.eot?#iefix') format('embedded-opentype'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-800.woff2') format('woff2'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-800.woff') format('woff'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-800.ttf') format('truetype'),url('../fonts/open-sans-v34-vietnamese_latin-ext_latin_hebrew_greek-ext_greek_cyrillic-ext_cyrillic-800.svg#OpenSans') format('svg');
}

/* Piano Theme Variables */
:root {
  --piano-black: #111111;
  --piano-white: #ffffff;
  --piano-key-shadow: #222222;
  --button-background: var(--piano-white);
  --button-text: var(--piano-black);
  --button-border: 2px solid var(--piano-black);
  --button-hover-background: var(--piano-black);
  --button-hover-text: var(--piano-white);
  --button-hover-border: 2px solid var(--piano-white);
}

html, body {
  height: 100%;
  min-height: 100vh;
}
body {
    margin: 0;
    min-height: 100vh;
    background-image: url('https://img.freepik.com/premium-photo/detail-shot-piano-keys_1048944-9988598.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Add an overlay to ensure text readability */
body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: transparent; /* Removed white overlay */
    z-index: 1;
}

.container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 50vh; /* Reduced from 60vh */
  max-width: 32rem;
  width: 100%;
  margin: 1.5rem auto; /* Reduced from 2rem */
  background: var(--piano-white);
  border-radius: 1.5rem;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12), 0 1.5px 0 var(--piano-black);
  border: 2px solid var(--piano-black);
  padding: 1rem 1.5rem 1rem 1.5rem; /* Further reduced vertical padding for desktop */
  position: relative;
  z-index: 2; /* Ensure content appears above the overlay */
}

/* Tablet responsive styles */
@media (max-width: 768px) and (min-width: 601px) {
  .container {
    padding: 0.75rem 1.5rem 0.75rem 1.5rem; /* Equal top and bottom padding for tablet */
    min-height: 40vh;                        /* Further reduced container height */
  }
  h1 {
    margin: 0 0 var(--spacing-xs) 0;         /* Reduced header spacing */
  }
  .container p {
    margin: 0 0 var(--spacing-xs) 0;         /* Further reduced paragraph spacing */
  }
  footer {
    margin: var(--spacing-xs) 0;             /* Minimal footer spacing */
    padding-top: 0.25rem;                    /* Minimal footer padding */
  }
}

@media (max-width: 600px) {
  .container {
    min-height: unset;
    max-width: 90vw;
    padding: 0.75rem 1.5rem 0.75rem 1.5rem; /* Equal top and bottom padding for mobile */
    border-radius: 0.75rem;
  }
  h1 {
    font-size: 2rem;
  }
  .avatar {
    width: 5.5rem;
    height: 5.5rem;
  }
  .button, button {
    width: 100%;
    min-width: unset;
    font-size: 1rem;
    padding: 0.5rem 0.5rem;
  }
  footer {
    margin: var(--spacing-s) 0;              /* Further reduced footer spacing for mobile */
    padding-top: 0.5rem;                     /* Reduced footer padding for mobile */
  }
}

.column {
  width: 100%;
  float: none;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.button-stack {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

h1 {
  color: var(--piano-black);
  letter-spacing: 0.05em;
  font-family: 'Emblema One', cursive;
}

.button, button {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--button-background);
  color: var(--button-text);
  border: var(--button-border);
  border-radius: 0.25rem;
  box-shadow: 0 4px 0 var(--piano-key-shadow);
  transition: all 0.2s cubic-bezier(.4,0,.2,1);
  font-family: 'Open Sans', system-ui;
  font-weight: 700;
  margin-bottom: 1.5rem;
}
/* Removed piano key pattern from all buttons */
.button .icon {
  z-index: 10;
  margin-right: 0.5rem;
  display: inline-block;
  position: relative;
  opacity: 1;
  filter: invert(0);
  transition: all 0.2s ease;
}
.button span {
  z-index: 10;
  display: inline-block;
  position: relative;
}
.button:hover, button:hover {
  background: var(--button-hover-background);
  color: var(--button-hover-text);
  border: var(--button-hover-border);
  box-shadow: 0 2px 0 var(--piano-white);
}

footer {
  color: var(--piano-black);
  border-top: 1px solid var(--piano-black);
  padding-top: 0.75rem; /* Reduced from 1rem */
  margin-top: 1rem; /* Reduced from 2rem */
}

.avatar {
  border: 4px solid var(--piano-black);
  background: var(--piano-white);
  box-shadow: 0 2px 0 var(--piano-key-shadow);
}

/* Facebook button piano style */
.button-faceb {
  background: var(--piano-black);
  color: var(--piano-white);
  border: 2px solid var(--piano-black);
}
.button-faceb .icon {
  filter: invert(1) drop-shadow(0 0 1px rgba(0,0,0,0.3)) !important;
  opacity: 1;
}
.button-faceb:hover {
  background: var(--piano-black);
  color: var(--piano-white);
  border: 2px solid var(--piano-black);
}
.button-faceb:hover .icon {
  filter: brightness(0) saturate(100%) invert(1) !important;
  opacity: 1;
}

/* Messenger button piano style */
.button-messenger {
  background: var(--piano-black);
  color: var(--piano-white);
  border: 2px solid var(--piano-black);
}
.button-messenger .icon {
  filter: invert(1) drop-shadow(0 0 1px rgba(0,0,0,0.3)) !important;
  opacity: 1;
}
.button-messenger:hover {
  background: var(--piano-black);
  color: var(--piano-white);
  border: 2px solid var(--piano-black);
}
.button-messenger:hover .icon {
  filter: brightness(0) saturate(100%) invert(1) !important;
  opacity: 1;
}

/* Zalo button piano style */
.button-zalo {
  background: var(--piano-white);
  color: var(--piano-black);
  border: 2px solid var(--piano-black);
}
.button-zalo .icon {
  filter: brightness(0) saturate(100%) !important;
  opacity: 1;
  width: 1.4rem;
  height: 1.4rem;
}
.button-zalo:hover {
  background: var(--piano-black);
  color: var(--piano-white);
  border: 2px solid var(--piano-black);
}
.button-zalo:hover .icon {
  filter: brightness(0) saturate(100%) invert(1) !important;
  opacity: 1;
}

/* Clean button-default styling without piano key pattern */
.button-default {
  background: var(--button-background);
  color: var(--button-text);
  border: 2px solid var(--piano-black);
}
.button-default .icon {
  filter: brightness(0) saturate(100%) !important;
  opacity: 1;
}
.button-default:hover {
  background: var(--piano-black);
  color: var(--piano-white);
  border: 2px solid var(--piano-black);
}
.button-default:hover .icon {
  filter: brightness(0) saturate(100%) invert(1) !important;
  opacity: 1;
}